TBN -
Well even Australia managed the change. The RAAF does not fly helos anymore. The Army and RAN do it very well these days...
as I recall, it was a disaster for several years because the 'assumption' was that everyone would just move across. The Army ended up with a load of helicopters they couldn't fly or maintain and a lot of pi**ed-off people.
I think anyone considering messing with our current structure would do well to examine what went wrong there.