(Why these geriatrics (77 years old) in DC can’t just go away and enjoy their golden years is beyond me.)
If I were to guess, political idealogues, maybe?
Plus the money must be really good.
Can’t be just the money. Having your fingers on the levers of state power, people hanging on your every word, and the perqs of the position must be hard to give up. ‘No one else can do this,’ I imagine them thinking. ‘They need me!’