The theory basically goes if you pay them millions they will not need to resort to the classic bribery that goes on, of course people prefer to work honestly and transparently at the job they’re supposed to. Politicians just historically make their money/frills from lobbyists because they’re poorly compensated in general.
Also, their proposal is that as long term policy is judged the politicians who enacted the well-done legislation can get bonuses.
A few holes in this logic:
1. It cost gazillions of dollars to get into office, honest people oftentimes can’t afford to get on the ballot.
2. You still haven’t explained how they quantify success. In a 4 year term a representative official (senator/congressman) will have voted on hundreds/thousands of items, and their voting record is only a small voice in determining the outcome of each of those votes. Multiply that by hundreds of elected officials with different/overlapping time periods served, and it’s hard to quantify this stuff on scale to decide who merits a bonus.
3. If the bonuses come at the end of said long term, the politicians will have long retired/been voted out. It’s hard to tempt someone with a vague promise down the road, where there’s an opportunity in the here and now to partner with specific interests, vote a certain way, introduce certain bills, and your campaign is well funded for the next election.