Possibly naive question, apologies in advance if it’s answered somewhere already.
If zk proofs allow transaction obfuscation, why not centralize mining under a trusted authority (or perhaps federate it)? This is anathema to most cryptocurrency enthusiasts, but the privilege of simply determining the order of transactions, without any ability to know anything about them, seems like an extremely limited form of centralized authority (like a blind PayPal). But it would completely solve efficiency/scale issues and energy wasting, no more proof-of-work/stake, etc etc. Honest question… what are the risks? what are the tradeoffs?