GoKawiilHarvard study finds credit card rewards shift $9.2B a year to wealthy shoppers
A Harvard Business School analysis led by Professor Mark Egan finds that interchange fees baked into retail prices generate about $9.2 billion annually in net rewards for affluent credit card users, while cash and debit customers pay the same higher prices but receive little or none of that money back. Across the broader economy, the researchers estimate roughly $30 billion moves each year from cash and debit users to credit card users at the same stores.