What you're describing is effectively what YouTube Red does. You pay a flat monthly amount and revenue is distributed out to creators based upon the videos you watch. [0]
Full disclosure: I work at YouTube but not on Red.
Sorry if i missed something obvious, but from the linked page it not entirely clear to me if my monthly amount would be distributed only between the channels I actually watch or like Spotify where content producers get their revenue based on their share of total views in the pool favoring the people on top.
"New revenue from YouTube Red membership fees will be distributed to video creators based on how much members watch your content."
I use YouTube Red and love it. My YouTube usage has doubled because I don't see ads. And I feel good knowing I'm helping the video makers whether I skip ads or not.
As soon as you guys bring Red to the UK I'm on it. Do you know of anything about the rollout schedule? It actually feels like YouTube's given up on Red from this end of the pond.
Full disclosure: I work at YouTube but not on Red.
[0] https://support.google.com/youtube/answer/6306276?hl=en