Earlier quoted context omitted.
Regardless, it never ceases to amaze me how controversial pricing discrimination is. Especially since most people have taken Econ 101: pricing discrimination eliminates dead-weight loss, which should be a good thing right? Nope, instant controversy.
Guy who has taken Econ 101 here. Price discrimination doesn't eliminate dead-weight loss (it really has nothing to do with dead-weight loss), it just converts consumer surplus into producer surplus. https://en.wikipedia.org/wiki/Price_discrimination#Types_of_...
[Technical note: By "average" I really mean the optimal price if the producer is only allowed to set a single price point. But let's not quibble.]