That's not how that works. Net Neutrality is about preventing ISPs from limiting or throttling access to different parts of the internet. Under Net Neutrality Netflix can buy faster access to the internet at a higher price all it wants, they just can't buy access to you at a higher price. Without Net Neutrality an ISP could simply block you from having access to Netflix, or youtube, or facebook, or twitter, or amazon. Or they could throttle that traffic so that the experience was much worse than it would be otherwise. They could then force you or those companies to pay extra to "unlock" access.
Because broadband internet access in the US is substantially provided by effectively local monopolies there is a huge potential for abuse here, specifically in the form of "rent seeking". Without Net Neutrality there is a huge potential for ISPs to monetize access to you, to carve up, control, and censor what they allow to run over their pipes. This isn't hypothetical, it's happened. ISPs have blocked access to VOIP and voice chat services (like skype) because it competed with their own offerings. They've blocked access to specific webpages because they disagreed with the content on those sites. They've blocked access to streaming video. They've intercepted and redirected search queries (to sites like google) to their own commercial content. They've blocked payment services that competed with their own services. And so on.
Because broadband internet access in the US is substantially provided by effectively local monopolies there is a huge potential for abuse here, specifically in the form of "rent seeking". Without Net Neutrality there is a huge potential for ISPs to monetize access to you, to carve up, control, and censor what they allow to run over their pipes. This isn't hypothetical, it's happened. ISPs have blocked access to VOIP and voice chat services (like skype) because it competed with their own offerings. They've blocked access to specific webpages because they disagreed with the content on those sites. They've blocked access to streaming video. They've intercepted and redirected search queries (to sites like google) to their own commercial content. They've blocked payment services that competed with their own services. And so on.