I don't think there is anything to prevent one government from undoing what another government has done, unless it is something constitutional where they have to have buy in from at least 7 provinces and 50% of the population.

There is no solution that will prevent a minority of greedy people from trying to take from others. We fight the same battles our parents fought and our children will have to fight those same battles as will their children. The only hope is to make sure enough people are educated as to why publicly regulated institutions are important to protect and pass those lessons down to the next generation.

A society where we choose to kneecap ourselves every few years because we allow people to raise ignorant bigots seems less sustainable than one where we outlaw right wing ideologies.