A 401k is a target date fund that is a mix of hundreds or thousands of companies. It is hardly comparable to the stock proportions that actual investors are playing with; and does not have the power of "buy, borrow, die" that the capitalist class enjoys to avoid taxation for generations of wealth.
A 401k a worker drops a couple hundred bucks into after each paycheck is hardly "the snake eating itself". It's a glorified savings account that makes stupid people feel like their interest align with those with actual capital. A 401k account is quickly becoming a means of the capitalist class gambling with your retirement savings account.