I called this Corporate Feudalism back in the 1980s
When GE bought out RCA (at that time a very successful company), I saw the handwriting on the wall and called it Corporate Feudalism. You may recall that with feudalism, the King was able to tax anybody into starvation, and if somehow someone escaped that fate, the lower level lords had absolute power over the serfs who had no real rights at all. We are very rapidly reaching that state here in the US.