You have a point, but there is one problem... Passive investors do sit and wait for returns. That is just what they do. Does that mean we don't want passive investors in STEEM? Is it not better then, that they have the opportunity to power active curators and growing the community?

The percentage split in reward could be debated. However, a free market negotiation between curators and investors should be able to determine the best split. It is actually just like hiring curators, and the "salary" would be determined by negotiation. Why shouldn't investors be able to decide how to best use their STEEM power?