Full financial transparency for all elected officials. If Matt Gaetz buys a dildo, everyone knows about it. Serving in Congress is a service, not something you should want to do for life.
Wyoming Rule.
Gerrymandering is treason. Straight to gitmo.
Bribery is treason. Straight to gitmo. In cases of corporate bribery, the board is held responsible.
Money is not speech.
Corporations are not people.
Not quite sure how to codify it in law, but something to force anti-trust action (since existing laws just aren't enforced). Maybe every year, the top 5 companies by market cap are forcibly broken up into at least 3 entities?
I've been thinking about this a lot since making the thread and I've realized that one of the root causes of our problems as Americans is that we haven't enforced the laws we've had on the books for a very long time, and we haven't because we allowed ourselves to be manipulated by evil people. I am not sure if it's possible to build a system that can protect people against having the very same debate system we evolved with turned against us to convince us to do or accept things we otherwise wouldn't.
I think that's why the majority of my suggestions relate to democracy itself -- if we can get away from "two parties pooping back and forth forever", we increase the odds of good people getting into power. Hopefully.
This needs to be encoded in the system we build - that it is not possible to build the perfect system of law, but rather any system we build will, over time, come to reflect the character and viability of our principles.