No, he didn't. Warren Buffet said his secretary, not a waitress, because secretaries get paychecks, and his secretary makes like $200k-500k. And they are supposed to claim tips if they make more than $20/month, which 100% of them do. They report tips that are left on credit cards, and don't report cash tips, and none of them are paying even 1% the dollar amount of that pesky "top 1%". His secretary getting paychecks up to $500k might very well be paying a higher percentage than Warren Buffet whose money isn't even income until he sells his stocks.
Just lol at pretending it's waitresses that are keeping the income tax revenue afloat. Oh yeah, the whole system would come tumbling down if it weren't being propped up by all that sweet tax revenue being paid by cocktail waitresses.