$10M at 10% returns is $1M/yr passive. That'll pay for an expensive apartment before you consider working.
In fact, that's sort of the problem: the massive "rich people get paid for being rich in proportion to how rich they are" cash flows run away exponentially from the "poor people get paid for working" cash flows, inflating the price of any inelastic good beyond their reach. The economy stops being about work and starts being about wealth. Which might be fine if most people were wealthy enough to not work, but that's overwhelmingly not the case so it's overwhelmingly not fine.
In fact, that's sort of the problem: the massive "rich people get paid for being rich in proportion to how rich they are" cash flows run away exponentially from the "poor people get paid for working" cash flows, inflating the price of any inelastic good beyond their reach. The economy stops being about work and starts being about wealth. Which might be fine if most people were wealthy enough to not work, but that's overwhelmingly not the case so it's overwhelmingly not fine.