A floor is horrible for a number of reasons, and I don't see any benefits in it.I know where you are making your mistake. Most of the time a free market does do better. This isn't one of them. I'm not sure why you don't get that the economic benefits of a floor out way the restrictions of the capping effect.
If you hate the floor thats fine. Thats another discussion and I'm happy to talk about it but to totally dismiss the benefits of a floor and to only concentrate on the capping effect is misleading.