There are cases now where older ATCOs are being posted out because they are too expensive when their jobs can be done by T&Ds!
T&D pay scale for a valid ATCO is unacceptable and lower than the starting salary at many small GA aerodromes (many FISOs earn more than a valid T&D ATCO).
The big picture = agree cheep ATCOs wages then suffer the consequences of the availability of underpaid staff!