This is one that SO tempts me. But, ultimately, we have term limits, it's called an election. Much as I would love for some of those asses to have to work for a living, the people of their States and Districts did chose to send them back, time after time.
On the one hand, who am I to tell them they can't? On the other hand, it was never the intent of the Framers for us to have a political aristocracy -- the intent was a term of public service and then back to a real life.
I'm not sure how I'd come down on a term-limits amendment.