The whole point of mining/staking/whatever is to be expensive. Governments can pigouvian tax it to high hell, mine workers can unionize, and it won’t make any difference to users whatsoever. So there’s literally no benefit to more energy use.
Bitcoin mines can’t do general computing. They use ASICs that can only mine.
Neoliberals: “OK how about we keep doing the thing that makes them care only about next quarter, but give them a $1 fine every time they’re negligent?”