Except we won't. We rarely do, and only at onesies and twosies.
Besides, they aren't working on the fiscal cliff anyway, even if it looks like they are. They're wielding a tool which they created which gives them another way to make the other side look bad. That's the entire point. Governing is a side effect.
Tip O'Neill said that all politics is local. That may be true for elections. But it is certain that all government is politics.