Fixing the vote?.. It's unclear why that would be necessary. If default atm adds nothing and votes follow from stakes voting, I can't see where the risk is. It would be adding in politics where it might not be needed?.. Better everyone is on the inside.
If you do go that route then avoid doing it in a way that users are unaware of, as such moves are known to irritate.
It could be made an explicit upfront acknowledgement of default slate, like terms and conditions often are.. suggesting in the absence of you choosing others, these are our core developers and they are recommended to you.. click to vote for these.. implicit then perhaps that users should be voting for someone. The thought then is don't take power from people but appeal to them.
I'd suggest either way, voting needs to be made more obvious in the GUI with perhaps a pop-up introduction that details what the process is and has pointers where to find more information could help encourage people to engage with voting.
I suppose on the upside it weights voting against any kind of future conspiracy but would that not be short lived if it did occur.