I would add that Management(?) are also planning on technology ( FPCP etc) reducing the number of controllers over time.
the only problem is that FPCPF function is years away. They're still testing it, and arguing about its impact on the role of ATC's (will be we still be seperators or just monitors with assoiciated legal issues) And they have'nt even started the training - and I think enough has already been written about our training capacity.