[chii]

If it's as truly a scam as you seem to think, wouldn't you think it also strange that many participants willingly participate in this system?

It's not like there's a gun to the heads of producers and traders. Market makers are also usually not a single entity. Traders could trade amongst themselves in a different exchange that bans market makers. And yet no such exchange exists (as far as i know - except over the counter exchanges perhaps, which not many people use).