When House Speaker John Boehner calls for trillions of dollars of spending cuts, the message is clear. Any deal to raise the federal debt ceiling must include significant savings in Social Security and Medicare benefits. Subsidizing the elderly is the biggest piece of federal spending (more than two-fifths of the total), but trimming benefits for well-off seniors isn't just budget arithmetic. It's also the right thing to do. I have been urging higher eligibility ages and more means-testing for Social Security and Medicare for so long that I forget that many Americans still accept the outdated and propagandistic notion that...