No one in power is trying to design and put in place comprehensive plans to solve any particular problem. It’s all isolated one-offs, mostly involving dumping money instead of regulation, intended to improve a politician’s or party’s political standing.
The ACA and Dodd-Frank, whatever you think of them, were the last counter examples. That was more than a dozen years ago.
The increasingly accessible and increasingly rapid outrage/feedback loop brought to us by 24/7 cable news, social media, etc. has made it harder to push forward on meaningful complicated legislation.
Something like the Voting Rights Act, Medicare, Social Security, or interstate highways would, I suspect, be strangled in the crib today by vested interests spreading misinformation about them.
The ACA and Dodd-Frank, whatever you think of them, were the last counter examples. That was more than a dozen years ago.