Hello
I do believe as you do that most agents don't deserve the dollar amount the commissions equate to in the sale of a home. But I have found that in attempting to get the "power" agents to give up any bit of their "entitled" commission gets you placed on the do not call list for homes that are not listed yet (the inside). Thus, you are not able to get your buyers homes before they are on the market thus saving them from multiple offer situations (at least for good property on the westside). Also, many of these agents have a set up network of agents they like to do business with and if you rock the boat, you're out.
Selling since 2001, I have realized that many top agents hide behind their corporate banners to give them the power and market share impressions high net worth clients seem to look for. The irony is that a great RE agent can be just that wherever they decide to work.
DBerman