You approach it by coordinating en masse to come up with a small list of reasonable demands, get widespread consensus on it, switch from W2 to I9 and withhold both your federal taxes and your mortgage payments until the demands are met. If they wanna play chicken re: crashing the system, well that's a game that two can play.

Or at least that's what my rough draft looks like anyway. Though I suspect that hunger may end up being a more potent catalyst for political change than anything I can plan. Unless H5N1 gets feisty first. COVID was a warning shot, if nature scores a direct hit, that'll be plenty catalytic too.

As for why: establishing a Mars colony is going to require the kind of sacrifice that a democratic government would prevent. So, down with democracy.