What utter crap BP77
The GA guys start out in a single engine aeroplane, and at the end of their stint after flying piston twins, turbine singles and twins are generally regional airline captains on Dash 8s, Brasilia's, Metros, Saabs etc.
They are a far better product with multi crew command experience than a know it all cadet who has never had any command experience other than 70 hours in a light aircraft.
I had been operating in a CAR217 operation in GA using simulators every 6 months for my checks. I had been exposed to this for some time before I even started flying for a regional airline.
The reason Europe has cadets is they have no GA. If they did, the system would be the same as here or the US.