The regulators really do need to get on top of this
I think the regulators are a lot of the problem:
They need to pay enough to get the best staff.
They are too short-staffed to send inspectors out to units except where essential.
They enforce ever tighter financial situation on the large ANSP which then encourages experienced, expensive staff to leave and forces every unit to be operated short-staffed.
They actively encourage market forces on ANSP provision, which leads to wholesale staff change throughout the country and the many dangers which go with this. Market forces can also increase costs.
They turn a blind-eye to units being dangerously understaffed, apparently seeing it as a local business-risk rather than a safety risk.