In the US we have a much better system. The overwhelming majority of buyers spend ~3% more on every purchase and then wealthy cardholders who can attain the requisite credit ratings for rewards cards are given a cut of this 3%. The rest of it goes to the card companies bottom line. A truly magnificent system.
You don't have to be wealthy to have a good credit score and/or a rewards card. It's pretty easy for anyone to get a decent rewards card nowadays. In fact I'd say the system is more perverse in that it rewards good credit to those who are slaves to credit, not those who are fiscally responsible.
/s