In regards to your second point - I think I would argue that while currently BPs are the best candidates for some of these funds - not all of the best candidates for these funds make good BPs. This happens in all DPoS, Steem and EOS included.
If a system like we're talking about was created, you'd end up seeing some of those who are currently BPs close out the block production side of their organization and move to the other side. It would be a smart move on their behalf. They are still rewarded for what they do, competing in the same way, are good at what they do, elected by the community, and give value (in the form of work) back into the system.
The difference is they are just no longer in control of consensus in the same way. The most critical role of a block producer is to actually produce blocks and keep the system running. Anything beyond that in which BPs choose to engage in, for the betterment of the DPOS chain in question, is "extra" in order to stand out in the competition.
A worker proposal system, whether this, or any other, provides an alternative to non-technical teams who don't need to be in charge of consensus.
RE: Inflation, Centralization, and DPoS