> I'm people, how can I do it?
Vote (well-informed of the candidate's policies) in every election you can, even the local ones that seem of little consequence.
Convince others to vote.
Make demands of your elected representatives. You can mail them, call them, etc.
The government is the people.
The Reagan-era and beyond successful convincing of people that the government is an unchangeable black box made up of shady actors out to destroy everything (see: Republicans still going on about the 'deep state' when they run literally everything) is a big part of how we got to this place. It was a self-fulfilling lie, now coming true as the people who sold the lie start grasping for unending power.
But we still have the ability to vote our way out of it. If we continue to fail to do so, then at an evolutionary level we have to consider that we collectively deserve all the bad that comes from it.
Voting only changes things when it doesn’t threaten the interests of elites or there is a sufficient counterweight in terms of a competitor nation or a radical labor movement or an uncontrolled armed insurgency.
See salvador allende in chile and mitternand in france for examples of voting without sufficient leverage.
your regan example occurred during a successful counterattack by capital that started under carter and crushed the labor movement.