Shocker: Paul Ryan's budget means more big tax cuts for the rich.

No surprise here, but the tax cuts in Paul Ryan’s 2013 budget plan would result in huge benefits for high-income people and very modest—or no— benefits for low income working households, according to a new analysis by the Tax Policy Center.

TPC looked only at the tax reductions in Ryan’s plan, which also included offsetting–but unidentified–cuts in tax credits, exclusions, and deductions. TPC found that in 2015, relative to today’s tax system, those making $1 million or more would enjoy an average tax cut of $265,000 and see their after-tax income increase by 12.5 percent. By contrast, half of those making between $20,000 and $30,000 would get no tax cut at all. On average, people in that income group would get a tax reduction of $129. Ryan would raise their after-tax income by 0.5 percent.

Nearly all middle-income households (those making between $50,000 and $75,000) would see their taxes fall, by an average of roughly $1,000. Ryan would increase their after-tax income by about 2 percent.

Ryan would extend all of the 2001/2003 tax cuts, and then consolidate individual rates to just two—10 and 25 percent. In addition, he’d repeal the Alternative Minimum Tax, reduce the corporate rate from 35 percent to 25 percent, and kill the tax provisions of the 2010 health reform law.

Earlier this week, TPC projected the tax cuts in Ryan’s budget would add $4.6 trillion to the federal deficit over the next decade, even after extending the 2001/2003 tax cuts, which would add another $5.4 trillion to the deficit.

Ryan argues that eliminating or scaling back deductions, credits, and exclusions ought to be part of the GOP fiscal plan. But he won’t say how.

Cuts in those tax preferences could make a big difference in determining who wins and who loses from the tax portion of his budget. But until House Republicans describe which they’d cut, there is no way to estimate what those base-broadeners would mean.

In truth, unless Republicans raise taxes on capital gains and dividends, it is hard to imagine the highest income households getting anything other than a windfall from this budget. Other tax preferences, such as the mortgage interest deduction, are just not that valuable to them.

And since no high-profile Republicans want to raise taxes on gains and dividends (and many would cut investment taxes even further) this budget would likely result in a huge tax cut for those who need it least.  That’s not a great way to start an exercise whose stated goal is to eliminate the budget deficit.