If a company can not bond!
Then they have a right to employ only qualified persons they need at not less than award rate.
Here is the justification for such visa types as 457!
And it wont be GA that brings in the 457 replacement visa but the regional and airlines! but why don't you train? We do but the run to high paying countries, so we wont now for a while- we will steal some back.
It's cheaper.