OK. You're a billionaire. You put a billion dollars into a Bank of America savings account. They give you an interest rate of 2% per year. You close the account after 1 year with an extra $20,000,000 interest.

You now are rich on 2% a year.

$20,000,000 IS rich. Even next to 1 billion. Its not a matter of relativity. Its already been scientifically demonstrated that money stops buying happiness at about $70k a year; everything after that is just people attempting to make up for their personal shortcomings.