the ability to keep your job...
I also heard they didn't pay commission for sales (or at least it was very hard to achieve) which if true then wow in a retail sales job.. where is your motivation?
they don't pay commission because it gives consumers a better impression since it seems like they're not motivated by commissions to aggressively sell you ****. to a little degree you do notice an actual difference because they're not under constant immediate pressure, and their targets are set rather than open-ended (as much as you can make) in a commission based system. But they still have targets and if you persistently don't reach those targets guess what they'll do?
so yea, mostly a marketing thing