That's the kind of revolution we're supposed to have when the government becomes corrupt. Also, it wouldn't be all at once; term overlaps ensure that there would be continuity.
Terms overlap only in the Senate; the entire House stands for re-election every two years.
Right and then one party looks to create a situation where the other party has more people who will be ineligible.
In a house election the incumbent almost always wins. Everything is skewed towards their favor, and lets not forget modern gerrymandering, which essentially predetermines most congressional seats.