He proposes to make things provably secure and some basic regulation to promote that. It’s a straw man argument to dismiss it as him proposing “unaccountable human power structures”.

In my opinion governments (UK was the recent example with their crackdown on encryption) don’t want security - they want backdoors to eavesdrop on you. Why would governments promote provably secure systems? And how such systems will help them with their evil plans?

He does address the costs: "The 2023 global nominal GDP is estimated to be $105 trillion. How much is it worth to ensure human survival? $1 trillion? $50 trillion?"