For example when a new type is introduced its logical that there will be an intake of direct entry Captains and FO's but a good employer will. . .
I assume you are talking about a completely disorganized airline. Yes, these types of things happen, but airlines that plan ahead at least a little don't. The ones that don't come up with all sorts of excuses and attempts at justifying their actions.
In school, my teacher didn't accept the excuse that "my dog ate the homework" and nor do I.