I feel without a few basic set of rules, followed by bps and their voters, there is a realistic danger for this.
In addition producing blocks is a pretty straight forward task, well defined and measurable, and the performance of a bp is something relatively stable. On the other hand there is no clear idea what a wps might comprise, so with the necessary backing you could sell your pointless creatures.game to the fund. In particular with this open scope tons of proposals would compete and really boost voter apathy...