Though the offer to raise money by closing loopholes has a bipartisan pedigree — based on a plan proposed last year by the Democrat Erskine Bowles and the Republican Alan Simpson, the chairmen of President Obama’s deficit commission — it relies on rhetorical sleight of hand. If tax breaks are equivalent to government spending, eliminating them is equivalent to spending cuts. Mr. Boehner’s offer to do away with tax breaks in exchange for cutting entitlements raises no new revenue. It amounts to cutting spending twice.Porter goes on to point out that a) Democrats have opened many "loopholes" for the poor and middle class because it's often the only form of social spending that Republicans will allow, but b) on balance, tax deductions disproportionately benefit the wealthy. His main point: we should consider each break on its merits, not make a shibboleth out of closing out as many as possible.
I would add a couple of wrinkles. First, Republicans are conflicted about whether to regard tax breaks for the nonwealthy as spending or tax cuts. On the one hand, they've not only acceded to Democrat-initiated lower-income tax breaks, but sweetened their own wealthy-tilted tax cut goodies by cutting taxes and expanding loopholes for the nonwealthy as well. On the other hand, they've come to regret the low-end largess, as all that bitching about the 47%, the lucky duckies who pay no income taxes, demonstrates.
Second, if Republicans are pulling the wool over by treating loophole closures as tax hikes, they've got themselves fooled as well. When such tax "increases" were being bruited in the debt ceiling negotiations of 2011, Tom Coburn and others struggling to wriggle out of Grover Norquist's embrace experimented with casting loophole closures (e.g., the ethanol subsidy) as "spending cuts." It didn't fly; Norquist screamed that any phased out tax break would have to be offset by another tax break, and the GOP fell in line.