The actual American belief is generally "[Most] Rich people bad government worse".
The Pinkertons were breaking strikes launched by Americans, after all. May Day is a commemoration of an event that took place in Chicago. The reaction to the cold-blooded murder of an insurance executive on a public street is pretty characteristically American, in my view. We just don't like power.
For all the faults the FBI has I don't think Pinkerton's paid by Musk are a good alternative.