Everything you're stating is false. Amazon is trying to do right by its customers, and they are not obligated to let sellers not give their customers the best price available. Sellers are not obligated to sell on Amazon.
Your conclusion that this increases end pries for consumers has nothing to do with Amazon, but the sellers themselves.
Amazon was already told not to do this for anti-trust reasons, and they promised to oblige. Unless the government, Amazon, and the general public are all incorrect about what constitutes monopolistic behavior, you are. The idea that Amazon is openly defying pro-consumer laws to do right by its customers is absurd.
Your conclusion that this increases end pries for consumers has nothing to do with Amazon, but the sellers themselves.