It’s the whole reason SLS is the train wreck it is. Congress wouldn’t let them not keep shoveling money to the same people who made Space Shuttle parts. So instead of the best design possible, we got the best design using old parts.
It’s always depressing to me that there are pretty obvious ways to fix problems but absolutely no way to enact solutions.
Publicly funded elections (so corporations cannot buy their way in), and a ban on post-career employment for politicians fixes it immediately. But fat chance of that.