'Coalitional drift' would be the best description of the situation described.
Explanation:
A coalition drift is simply the change in how the newly elected government wants the executive agencies to function. A newly elected government made by a party other than the previous one naturally has a different ideology about how the government needs to be run.
When the new government directs the executive agencies to function in a certain way (the non-conventional way), there are chances that a coalitional drift would occur.
