The problem with lack of term limits is that once a politician is in office too long, they think they own the place. That the people are there to serve them. That is by far the grosses perversion of democracy. The incumbency rate and gerrymandering only serve to reinforce this.
I'd for a single 6 year presidency like WI, as it allows the president to make unpopular, but necessary decisions. And reps should have no more then four 2 year terms and senators no more than two 4 year terms.
"If your opponent is of choleric temperament, seek to irritate him." - Sun Tzu
"A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murder is less to fear"
Cicero Marcus Tullius
You are a liberal, you should get the concepts of fairness and opportunity...
I think it should be this way for POTUS, but since the term limits are constitutionally mandated, don't think it is worth the effort to fight it.
Money. That is what it takes. Understand it. Accept it.
There are probably some individuals who can maintain integrity throughout extremely long careers in the Senate or House; but they are few. Keep the turn-over fast and furious and your corruption lowers and production increases. Unless you are a fan of corruption, no representation and no productivity.
Not to mention, the longer the politican is in Washington, the less they are at HOME and they less they understand the issues in their states and districts.