Several years ago I came across a graph showing relative tax revenues collected from companies and individuals. I don't remember the details, but there was a time when the tax revenues came mostly (or maybe equally?) from corporate taxes and now they come mostly from personal income taxes.
It seems to me that going back to that would be a good place to start. Once we have companies paying for the systems that allow them to thrive, we can tackle personal wealth/income taxation disparities.
Let each ~~person~~ business rise and fall according the merits of their work and quality of their duties. No ~~person~~ business is entitled to anything. Even respect has to be earned.