If it less than average then they will not on net balance be beneficial to Australia.
Uh, no. Just because he has views you disagree with and is socially a bit retarded does not mean that he is unable to perform academically and by proxy have an above average productivity.
No but we've already got more than enough people to do average jobs.
Oh yeah totally, that's really a viable option. Polticians would totally go for that, right?
I don't think you understand how averages and normal distributions work