How do you think government research money is currently directed? Sure you get people from industry but you also get people from academia and government as well filling these positions. That's basically anyone with domain knowledge. Sure people can be corrupt and evil or whatever, but that's why you have other checks in your system to deal with it. If you think it can't be done just because 'government', that's not a strong argument because literally any sort of person in any position in any org, public or private, could be corrupted, and the race to the bottom of this logic is to trust nothing and no one.