You can't seriously believe it feasible to sack all of an airlines staff and re- hire within 2 weeks! That's got to be a tongue in cheek statement surely?
Depends what you hiring and how much you paying................and may not need to sack all.
I posted what is the nuclear option for management of an airline (any airline or business) and you will always find people willing to do it............enough cash you will find people.
Not sure any Airline in Europe would do this because they would get blocked at airports.