Going from your original numbers (which I didn’t check), a play current pays out just under half a cent (1/230), and you’d like Spotify to pay around 5 times that (avg 2c). Spotify distributes about 70% of revenue to rights holders so you’re asking Spotify to pay out ... 350% of revenue to rights holders?
Spotify could almost certainly be charging more, but it’s already incentivised to maximise revenue, and it has competitors, so it seems like it’s probably found the market value of a play?