The wealthy are getting richer because the federal reserve is pumping money into the economy, artificially keeping the stock market high.
If you want to separate capitalism and politics, just put in a flat tax and that would take away a lot of sway businesses would have over politicians.
People point out evil corporations or the evil rich but hardly point to the top one percent of the one percenters. They hardly ever point to the Federal Reserve owners, other central banks, the IMF and the World Bank.
Bill Clinton gave praise to one of his college professors, Carrol Quigley; he wrote a book, "Tragedy," and hopes it explains the workings of these very powerful people. If anybody is in control, it is these people.