> every government will absolutely double-issue certificates to police, secret service and friends of goverment, and no one will have any recourse.

Countries already have CA that issue certificates with more legal force than a handwritten signature. I can open a bank account, pay my taxes and sign up to all government services. But I can't use them for a webpage.

> With DANE (or other country-issued certificates)

DANE isn't a country-issued certificate. It's a scheme where you store your public keys on DNS records. Of course, now we have the issue that DNSSEC (signed DNS records) isn't widespread and the whole issue with DNS registries.