A trio of recent IRS rulings (here, here, and here) has rekindled debate on how our tax system should treat same-sex couples. Under the Defense of Marriage Act, the federal government does not recognize same-sex marriages. As one consequence, same-sex couples must file individual tax returns even if they are married or registered as domestic partners under state law.

Treasury Secretary Tim Geithner, among others, thinks the tea party movement might help drive deficit reduction. I disagree. I don’t believe most tea party leaders or candidates are remotely interested in slowing the flow of federal red ink. They are plainly interested in tax cuts—a core belief that appears repeatedly on Websites, position papers, and speeches throughout the movement. And while tea partiers say they favor smaller government, many in fact propose to shrink it in only trivial ways—by cutting earmarks or waste and abuse. Candidates elected on platforms supporting very large tax cuts and small spending reductions are likely to oppose aggressive efforts to reduce deficits, not back them. While some analysts see the tea partiers as the 21st century progeny of Ross Perot’s fiscal conservatism, nothing could be further from the truth.

Economists have traditionally drawn a sharp distinction between monetary and fiscal policy. Monetary policy should try to promote growth and limit inflation by setting short-term interest rates, managing the money supply, and providing liquidity during times of financial stress. Fiscal policy should also encourage growth and, more broadly, promote the general welfare through careful choices about spending, taxes, and borrowing. The Federal Reserve has responsibility for monetary policy, while Congress and the President handle fiscal policy.

Do we want to use the tax code to subsidize home ownership? And, if we do, is the mortgage interest deduction the best way to do it? A new paper by my Tax Policy Center colleagues Eric Toder and Katherine Lim, along with Urban Institute researchers Margery Turner and Liza Getsinger, asks these provocative questions, and comes up with some surprising answers.

I wasn’t going to write about Congress’ latest effort to continue scores of soon-to-expire special interest tax breaks. But there is something about the joint Ways & Means/ Senate Finance Committee bill’s Orwellian title: “The American Jobs and Closing Tax Loopholes Act" (AJACTLA) that makes it impossible to ignore.