Basically (and I’m not an expert here), the Uber rich get tax free spending money without taking big taxable salaries by leveraging their assets for super low interest loans. Current tax codes don’t consider these loans as taxable income, but they’re being used for the same things us peasants use our income for. By considering these cash flows as taxable, billionaires wouldn’t be able to hide behind the “it’s net worth not liquid income” bullshit these use to dodge taxes.
Now, obviously it would depend on how shit your life is with your parents vs alone, but in my case I was much happier being poor but living with great roommates and experiencing just simple privacy for the first time.