The notion that there are not already "internet fast lanes" is puzzling (not directed at you), because there have been ever since the first rate plan gave the consumer a speed or volume choice.
You've got it backwards. They want to limit how fast you can consume NetFlix no matter what tier of service you have contracted with your ISP for. If I paid for 50Mb down and Netflix can support that much TO me then my ISP damned well better support 50Mb down for me* at all of their connection points to the internet. *however they handle scaling is up to them, but if they give me certain speeds to their own content, they should have to provide me the same speeds to everything.
Friction is a drag.