Comment by knn

What do you mean by recent? There's been a whole society of rentiers living solely off investment income in most countries for at least the last 300 years, if not several thousand years. It's extremely well documented, especially in Britain and France since the early 1800's (see Thomas Piketty's work on wealth distribution). The more capital one owns, in general, more income is earned from capital rather than wages. This ratio increases sharply when you look at the top 1% and 0.1% of owners.