Hey Bushy - not a bad concept.
Think about it, if you did the usual thing of forking out obsene amounts of money to work in GA with NO prospect of actually getting into an airline one day, then hardly anyone would bother.
The result, probably half the amount or less Commercial Licences issued every year. This may have the effect that GA drivers might actually end up making more money than cleaners.
The old supply and demand equation could actually work in the drivers favour for a change.