One of the defining characteristics of liberals is that they NEVER learn from their mistakes. When a policy fails (or more frequently has exactly the opposite effect of its STATED intent) they always say "We just didn't go far enough." As if when doing x amount of something makes things worse, doing ten times x of it will somehow reverse the effect.
Liberals cannot learn. If they could they wouldn't be liberals.
Never underestimate the ability of a liberal to deny reality, and to change the rules to do so.