You may want to fork bitshares amd have earners run delegates as workers... Its a bit more decentralized through voting.
Forking Bitshares is an option but it's also an option to build on top of Tauchain or Ethereum. It depends on your time frame.
Devshares would be a not bad idea but then it's not mined. Tauchain would allow for mining. Ethereum would also allow for mining.