I think "taxes and levies" is a bit true, but also you pay for distribution. If your power line goes down in your neighborhood, you basically just grumble but it gets fixed. In wholesale connections you pay for the distribution power line (+ maintenance) basically up front, but it doesn't get put in the final wholesale bill.

This isn't to say your local utility isn't wasteful with its ratepayer money; it totally can be. There isn't enough pressure to lower rates. It's just worth saying that these specific "taxes" do have an intended destination, not just general govt.