In almost all USA industries, there is increasing amount of consolidation. The top 4 companies' in almost any industry has a larger share of the total market: https://www.economist.com/briefing/2016/03/26/too-much-of-a-... Some consolidation is natural, but a huge part is caused by mergers and acquisitions (M&A) fulled by Private Equity. The M&A benefits the shareholders of participating companies at the expense of c…
What is PE fueled by? IMO, in large part by zero interest rate policies.
If it was an artificially low interest rate we'd see wage inflation, as opposed to just asset inflation.