Bandwidth isn't free. You pay for it, I pay for it, Google pays for it, Netflix pays for it, everyone pays for it.

Bandwidth is what we pay for. Net neutrality does not mean we get bandwidth for free. People who use more bandwidth have to buy more bandwidth already.

These services that drive massive increases in bandwidth demand are the services I’m talking about. The demand for Netflix, for example, has required investment on the part of ISPs to support. Most residential cable broadband systems weren’t designed with these kinds of constant bandwidth demands in mind. So Netflix gets to grow, while ISPs face massively increased investment, lest their networks will be overrun. Why shouldn’t Netflix have to contribute to the increased investment that they are benefitting from?

> The demand for Netflix, for example, has required investment on the part of ISPs to support.

So the ISP were overselling bandwidth?

> Why shouldn’t Netflix have to contribute to the increased investment that they are benefitting from?

They do. Netflix give CDN boxes to ISPs for free. They contribute by saving the ISPs all that external bandwidth (which is what they oversell).

Those 10% of the internet's bandwidth are already paid for by the end user, why does there need be an extra charge?

Just remember, the people watching Netflix are the ones consuming the bandwidth. I agree, though, the watchers of Netflix should pay a tax so the rest of us don't get our network congested to the point our torrents are slowing down. :)

Most large bandwidth consumers do pay a 'kind of tax' to ISPs, by installing their own hardware at ISP's locations to lower the bandwidth use.