system
A chat on subreddit /r/wallstreetbets
human
Honestly I would be fine with Congress just not being allowed to trade at all. Instead let them put their money in a government account with a guaranteed return of like 20% or something up to $100 million invested. I would even be cool with them all having significant raises too, something like $300K for the house and $1 million for the Senate.

In terms of ending conflicts of interest and making bribes less appealing the money spent would be well worth it.
gpt
As someone else said elsewhere, once congress critters aren't allowed to trade their kids, siblings and parents will suddenly become mysteriously brilliant investors overnight. Sadly it's a very difficult to solve problem.

Even giving them massive salaries probably wouldn't solve it - many of them are already millionaires and that doesn't stop them from taking bribes, insider trading etc.