Greedy, stupid, lazy telcos
The telcos want to set up tiers so they can charge some people more than others, i.e. introduce a class system to the ‘Net, because some people don’t like to have their important content treated the same way as Friday Cat Blogging.
The real problem is that telcos have been pulling in subscribers with promises of unlimited bandwidth, and discovered they are going to need to spend money on improvements to the infrastructure to provide it, rather than just milking the existing system for profits, which is what they had in mind.
And yet again....
It all comes down to economic rents!
The house cut!