> If you select truly at random from the population you're going to pull a lot of people with not a lot in the way of resources, making for a very easy to bribe block, even if you have to repeat the bribes every few years as people shuffle through.

This is incorrect: elected politicians are much easier to bribe, because bribery of them is totally legal via campaign contributions. It's both expected and indeed necessary for politicians to ask for and take large amounts of money from others for their job.

Policing corruption of randomly selected citizens would be much easier, because the expectation is that none of them would be asking for money or accepting money for their jobs. With strict auditing, anything out of the ordinary would be pretty easy to spot. The problem with the current system is that vast transfers of money to legislators are perfectly ordinary.

Also, with random selection, the odds are higher of finding one or more inherently honest and ethical people who will blow the whistle if there's some kind of mass bribery scheme. But our current pay-to-play election system is a mass bribery scheme. Ask any politician how much time they spend fundraising: it's just a crazy % of their time. You may think politicians are lazy because they take so many breaks from legislating, but they're actually taking breaks to go out and fundraise.

Anyway, I think it's a misconception that poorer people are easier to bribe than richer people. It's also a misconception that richer people are "more successful". In my experience, richer people tend to be more obsessed with money. Many average people just want to be happy, have a family, have friends, enjoy life. They are satisfied with what they have. The only purpose of their job is to make it possible for them to go home from their job. Whereas people at the top never seem to be satisfied with what they have and always want more, more, more.