Economic Activism and Progressive Living

would be my answer. With the slogan of our Founding Fathers, No taxation with out representation.
That is the way to fend off the elite. If one can not vote, they will not pay any tax. The power concentrated in the top 1% or even 10%, is what leads to revolution to find a way to combat their power, that always becomes abusive.
Our best way to slow down this abuse by the ultra wealthy would be campaign finance reform to give the real power back to the non wealthy. That is where I'd start.

Democratic Socialism or at least, much closer to Western Europe systems.