Krugman is somewhat more polite than my headline:
It’s hard to overstate how destructive the economic ideas offered earlier this week by John Boehner, the House minority leader, would be if put into practice. Basically, he proposes two things: large tax cuts for the wealthy that would increase the budget deficit while doing little to support the economy, and sharp spending cuts that would depress the economy while doing little to improve budget prospects. Fewer jobs and bigger deficits — the perfect combination.
More broadly, if Republicans regain power, they will surely do what they did during the Bush years: they won’t seriously try to address the economy’s troubles; they’ll just use those troubles as an excuse to push the usual agenda, including Social Security privatization. They’ll also surely try to repeal health reform, which would be another twofer, reducing economic security even as it increases long-term deficits.