Right and that cable company has little incentive to expand those pipes if service is good enough (which it is). Netflix was paying more, in order to deliver slightly faster buffering times to their customers. If Netflix isn't paying for the massive amount of bandwidth they're using, then it's the cable company customers who pick up the cost. Why should cable company customers, who don't even have netflix, be forced to subsidize the rest?
And just because the pipes are laid into my house, doesn't mean that the providers aren't constantly upgrading their switches and routers to handle all of this. If what they have is fine enough for non-netflix traffic, then let netflix pay more for what they hog.