The "in a good year" qualifier in both your comment and the parent comment means that your conclusion that this person has left the "working class" is untrue. It's not uncommon to get a windfall (stock option vesting cliff, inheritance, capital gains, etc.) that boosts income in a single year to many multiples of one's typical income. Such an occurrence does not boost the recipient out of the working class. Managed carefully, it can change their life (buy a house, turbo-charge retirement savings, etc.) but no one's buying a private island with a single year of $500k income.