I am sympathetic to Mark's general point here, but I don't think the problem is "people think that they are entitled", but "people have saved enough money that -". Any alternate proposal is de facto redistribution / cross-subsidy - taking labor from 65+ for benefit of 30 yr olds https://twitter.com/NoLongerBennett/status/1486720150292205569 …
if so, then @NoLongerBennett doesn't need any policy or cultural changes - we're already where he wants to be