yeah I think so too. referral program is great, but it ain't everything. i've seen two bitcoin bull-runs up close, and if anything like that happens, worrying about yearly % is missing the point by two orders of magnitude. besides, anyone we get to do real work for BitShares will almost invariably become strong hands emotionally attached to the ecosystem.
currently nobody is even bothering to ask, meaning we need to encourage people to try anything they might think worthwhile that they can contribute with, instead of in any way restricting the space of possibility in advance for what kind of workers might get voted in.