Secondly do you really think they will put half of the population in prison or as you say execute? In the EU they wanted to enforce ACTA last year and people didn't allow it. People have the power to change what they don't like.
Depending on the collective to turn before driving over the cliff has never worked in history.
See the devastation of Rome's population from 1.3 million to 30,000 for 600+ years. There are many such examples.
Collectives are stable for as long as debt can expand (
currently at $150 trillion), then the megadeath stage ensues.