Today, President Obama is speaking on long-term deficit reduction. He’s expected to embrace the National Commission on Fiscal Responsibility and Reform’s general framework (also known as Bowles-Simpson).

Yesterday, the Progressive Policy Institute joined forces with the Moment of Truth Project to host an event to discuss what comprehensive tax reform should look like, and what it will take to get it passed. (Moment of Truth was formed by Fiscal Commission co-chairs Erskine Bowles and Sen. Alan Simpson to build momentum behind the commission’s deficit reduction plan.)

Yesterday’s event, at Johns Hopkins University, helped build the momentum for reform. There was wide consensus that tax reform will need to be bipartisan and comprehensive, and will need to scale back most of the $1.1 trillion in tax expenditures. Tax expenditures are at the heart of the “modified zero plan,” which would eliminate or scale them back, and use the savings to cut individual and corporate tax rates, as well as budget deficits.

Coinciding with the event, PPI released a policy memo on the modified zero plan, written by PPI Senior Fellow Paul Weinstein  and Marc Goldwein of the Committee for a Responsible Budget, and both formerly of the Commission. Both were on hand.

Yesterday’s forum event featured three Senators who have been leading the charge for reform – Michael Bennet (D-Colo.), Ron Wyden (D-Ore.) and Dan Coats (R-Ind.) – and one CEO and Fiscal Commission member, Dave Cote (CEO of Honeywell). They provided the big picture framing, so I’ll summarize the highlights of their remarks first, and then delve into the two panels of experts second.

Sen. Bennet kicked off the event with stories from the town halls he’d been spending the last two years doing: “In every single meeting, debt and deficit came up,” he said. “There’s a deep skepticism that if we can’t figure out how to pay our bills, it suggests a lack of confidence in our government and our elected leaders, and it’s fairly well-placed.”

Bennet offered three criteria for what a deficit reduction plan would have to accomplish to pass muster with voters. First, it would need to be comprehensive. “People know we can’t fix this overnight, but they want it to be comprehensive.”; Second, sacrifice has to be shared: “They want to know that we’re in this together, and everybody has a share of the burden.”; Third, it has to be bipartisan.

Coats laid out a similar series of principles for the legislation that he has introduced with Senator Wyden. First, he said, echoing Bennet, it has to be bipartisan. Second, it has to be revenue neutral. Third it has to be simple (“Right now we’ve got 71,000 plus pages of tax code, 10,000 plus special preferences and deductions. It’s a nightmare.) Fourth, it has to help out the middle class, and help families to save money for college, and help charitable organizations. And fifth and finally, “this has to be based on a principle of growth…the bottom line is it has to lead to jobs.”

Wyden looked at the problem through the lens of tax simplification, noting that as April 15 approaches, “Americans are going through the 6 billion hours they spend each year filling out tax forms — 690,000 years is what you have in an annual effort going through the water torture of figuring out if line 9 is modifying line 7.”

Wyden also stressed that any tax reform also needed to encourage investment in what he called “red-white-and-blue jobs” – that is, solid American jobs, preferably in manufacturing.  Wyden called his bill fundamentally a jobs bill.

Cote, CEO of Honeywell, echoed similar themes in his remarks. “We need a global competitiveness agenda for the U.S.” he began. “Our corporate tax system is globally uncompetitive. We have the highest tax rate in the world, and we’re the only major country with a territorial system that encourages companies to keep their cash overseas. And we give back $1.2 trillion in what is euphemistically named ‘tax expenditures,’ but just another form of spending that’s done through the tax code.”

Echoing the urgency of the Senators, Cote posed the looming crisis this way: “The debt problem can get resolved one of two ways. We can do it now and do it thoughtfully, or the bond market can force us t do it, like Greece and Portugal.”

Moving to the policy substance, the first panel featured Paul Weinstein, PPI Senior Fellow, Diane Rogers of the Concord Coalition, Alan Viard of the American Enterprise Institute, and Howard Gleckman of the Tax Policy Center as moderator

Weinstein gave the quick version and backstory of the “modified zero plan,” which is the subject of a new PPI memo Weinstein co-authored. As the name might suggest, it began as the “zero plan,” which was the name the deficit commission gave the plan that reduced all tax expenditures to zero, saving $1.1 trillion in deductions, credits, and deferrals. The “modified zero plan” put back in only a few consensus tax expenditures, like the EITC, a mortgage deduction, a charitable contribution deduction.

“The rates are lower, it simplifies the tax code to fewer incentives and helps reduce tax avoidance and mistakes,” explained Weinstein. “Obviously the revenue increases get bigger and bigger over time. We estimate $800 billion over ten years.”

Rogers responded favorably to the plan. “I like the approach. There’s something for everyone to love,” she said. “Liberals should like it because it’s progressive and better than having to cut direct spending. Conservatives should like it because it’s an economically efficient way to raise revenues, and it doesn’t raise the size of government. It reduces the size of government.”

Viard gave it two cheers. He called it “Well-specified and thoughtful. This is one of the best approaches you can have with an income-based tax system that includes a separate corporate income tax.” Viard’s stated preference was for a value-added tax (VAT), though the subsequent discussion highlighted how difficult the politics of transitioning to a VAT would be. (Rogers put it this way: “we should work within the existing system first.”)

As the discussion shifted into the politics of policy, there was general agreement that tax reform terminology is confusing to the general public, and any discussion of tax expenditures is going to lead to thousands of interest groups begging to keep their favorites. And again, there was agreement that it needs to be comprehensive. “Tax reform can’t be done unless it’s in the context of deficit reduction,” said Weinstein. “You need to look at the whole apple.”

The second panel featured Leonard Burman of Syracuse University, Marc Goldwein, of the Committee for a Responsible Federal Budget, Joseph Minarik of the Committee for Economic Development and Derek Thompson of The Atlantic as moderator.

Goldwein began by reiterating the consensus: “The current income tax code is a mess. There is a consensus to broaden the base, and reduce the rates, and don’t keep tax expenditures that aren’t worth their cost.”

But how to do that? Burman argued that ending tax expenditures would require not referring to them anymore as tax expenditures. “We need to change the fiscal language. I sometimes call them IRS pork,” he said. “Part of the problem is mischaracterizing tax expenditures. Some people think that by putting new tax expenditures in the code you’re making government smaller, but what you’re doing is just spending more money and making taxes higher to achieve a given level of revenue.”

Minarik, a grizzled veteran of tax fights, highlighted the fact that the inside-the-halls negotiating in Congress is very different from the “outside” formulating that goes on at events like this, and reminded everyone that the simpler the solution, the easier it will be to pass. In that respect, he said, a fifth-best solution that’s simple and straightforward is better than a second-best solution that can lead to more complicated politics.