I'd guess it exists for most politicians. I'm just specifically calling out Republican senators as it seems they're no longer beholden to the US power structure. It's a novel position for me to be hoping the US establishment retakes control, instead of succumbing to whatever external powers are working to disrupt it. Freedom has to arise from the people via technological progress, a collapse will merely drag us backwards.
As for how the creation of compromising material happens - people lust after power to obtain things that money can't buy. Epstein's island wasn't merely for recreation.