I think asking leftist socialist to admit the abject failure of their ideology would be as difficult as asking Christians to deny the divinity of Jesus. to do either is to destroy the faith and leftists are nothing without their utter belief that big government is their godhead, the source of all good and the pillar upon which they lean for strength. this isn't about logic, it is about faith.
they are true believers, like the climate changers and islamic fanatics, they have adhered their life to a belief that will not be shaken. we can only hope to not make more of them and short of eliminating them, quarantine them until they die off.