Good hunch, but in my experience, availability of trained staff was never really an issue in practice. Hiring well trained university faculty was always purely an economical problem. Universities often already have a trained surplus of faculty employees working in a highly reduced capacity. Especially in the last 10-15 years where distance learning became commonplace, a lot of faculty was replaced by low-paid part-time quasi-teachers, which would be more than happy to be offered a permanent position. To further demonstrate that this is an economical problem: those quasi-teachers often have different job titles other than "teacher", depending on the jurisdiction, in order to evade laws and evade the reach of (often very powerful) faculty unions.