Basically this is the Croke Park Agreement stratified- the push to lower wages for new entries and reduce costs overall while continuing the bribery of the senior members of the profession who are quite content to see the ladder pulled up behind them.
The CPA was a slicing and dicing of the employee sector between public and private employees with the latter taking the brunt of austerity policies. Now we have the stratification within the Croke Park protected sector and slicing and dicing of possible opposition or strike action by dumping austerity measures only on new entrants.
The final act in all this will be once the austerity measures have been applied in driving down remuneration at the bottom sector- a removal of the CPA altogether. The other shoe will drop and the senior public servants and civil servants will then be casting about for support to oppose it and none will be forthcoming.
The one thing you can count on is that senior teachers will not strike for anything other than their own interests. When their own interests are threatened as they undoubtedly will be they will have cut themselves off from any wider support.
The donkey keeps its eyes firmly fixed on its own carrot and brays noisily only when that particular carrot is withdrawn.