Assign negative weights to people who submit damaging pull requests?

Insert a layer of expert representatives (akin to congresspersons) to generate the PRs?

Making the system resilient doesn't sound like anything more than another engineering problem to me.

The nuances of politics cannot be boiled down to a Github repository. It's not as straightforward as you think it is I'm afraid.

Who said anything about GitHub? The situation would call for a highly specialized, custom-made solution. If you think that's impossible, please share your reasons for thinking so. Comments like yours are pure FUD and aren't in any way helpful.

well, how to identify "damaging" pull requests? i mean, that's what politics is.