Matt Miller points me to this article by Bruce Bartlett, one of very few conservatives who didn't abandon his principles in the face of party pressure these past eight years:
I think conservatives would better spend their diminished political capital figuring out how to finance the welfare state at the least cost to the economy and individual liberty, rather than fighting a losing battle to slash popular spending programs. But this will require them to accept the necessity of higher revenues.
It is simply unrealistic to think that tax cuts will continue to be a viable political strategy when the budget deficit exceeds $1 trillion, as it will this year. Nor is it realistic to think that taxes can be kept at 19 percent of GDP when spending is projected to grow by about 50 percent of GDP over the next generation, according to both the Congressional Budget Office and the Government Accountability Office. And that’s without any new spending programs being enacted.
If conservatives refuse to participate in the debate over how revenues will be raised, then liberals will do it on their own, which will likely give us much higher tax rates and a tax system that is more harmful to growth than necessary to fund the government. Instead of opposing any tax hike, I think it makes more sense for conservatives to figure out how best to raise the additional revenue that will be raised in any event.