By law is how we got to where we currently are. There's no reason to think that would change. You'd have to trick all the people who are old (plus all the people who realize they will get old too) to vote away their assets, income, and power.

Unrest will just harden the people who see your cause as unjust against it. That will be a strong majority of people, so will go no where.

Revolution seems highly unlikely to succeed -- it would be unpopular and you'd have to turn much of the military/police to your side.

Frankly, I think the push of the idea of the intergenerational conflict is a con. It will not lead to anything getting better, but when people are angry and scared, they become vulnerable.

Be wary of anyone offering big, impossible promises. They'll be sticking their hands into your wallet soon enough.