It would reduce downward pressure on wages, because the permit cost would be bid up until there was an equilibrium (based on the present cost of all potential wage savings on the future). This would serve two purposes; first, there would be more transparency, and the number of visas available could be adjusted to find the 'right balance', and second, employers would be most willing to pay a high premium for talents unavailable in the domestic market.

To be clear, I think all these restrictions are terrible, and am an open borders advocate, but find the design of these programs very interesting (and near impossible).