We need to know who decides how much we earn.

Why?
Read their already made posts, look how they behave/vote, or stalk them in some other way if you feel the need to to get an idea.
Just because Steem is quite dominated by "whales" right now doesn't mean you should orientate your posts towards what they might like or not but create high-quality content. Sure, that's not easy with the temptation of a quick buck and can get frustrating (as it is for myself sometimes), but "whale-hunting" isn't the idea behind Steem and will hopefully fade out as an early-adoption issue over time.