Is there a government in existence now or at any time in the past that didn't solely exist to rubberstamp the rich's laws? The peasants republic of Dithmarschen?
I mean, yeah. There have been a lot of revolutions in world history. They did not exist _solely_ to rubber stamp the laws of the rich.
Even those revolutions that were overtly for the people were subvertly actually for elevating and empowering the inner circle of the revolution leaders. I'd love to find an example of a national government that prioritizes the well being of the majority rather than the personal profits of the oligarchy, but I don't believe one exists or has existed for some time.