The real cost model vs. "neutrality"
The cost model (& thus arguably the revenue model) for providing Internet service is largely analogous to electricity supply.
How much data you down or up load = how much electricity you use. (Though in contrast to smart metering, you pay for up loading, rather than getting a refund!).
The capacity of the pipe to your endpoint (e.g. home) = maximum demand tariff (how large a current is capable of being delivered)
With Internet service, there is one other factor – traffic prioritisation, for e.g. streaming media (in electricity supply, it’s always real time!)
Accommodating these three factors contribute independently to the cost of provision, therefore should be charged separately. Any deviation from that should be recognised as a special deal for a particular type of user, which as such subsidises that user, inevitably penalising others.
However, audio and visual media suppliers and users are the ones with most to gain from the subsidy, hence the strength of lobbying on grounds of ostensible democracy, fairness, etc.
Such a charging model would also highlight the dominance in general Internet use of bandwidth and processor hungry rich media content delivered, unasked, as advertising. This currently contributes massively to bandwidth usage, slowing access to services whose providers may not even have profiled the proportion of traffic which is theirs as opposed to the advertisers’.