I'm thinking that a big part of the push for this is that the police feel, and probably correctly, that Seasoned Citizens riding the scooters will not put up much if any fuss over any mandated driving tests whereas muzzies of course would first burn down the police station and then sue the police.....and win.
The mandated testing is also an excellent 'foot in the door' for mandated licensing and eventually mandated registration and taxation.
It will be another huge moneymaker for the Government, and the public will have yet another aspect of their lives closely regulated, taxed, and fined if necessary.