I understand that in the USA instrument approaches at non tower airports are in a minimum of class E airspace.
From my experience flying in the US system it is the en route controller who often provides the approach service when IMC exists at the airport.
Do en route controllers get special training for this? Do they get paid extra for providing approach services?
As a quick explanation I am an Australian pilot and a previous Chairman of the Australian CAA- sort of equivalent to the US FAA. I have attempted over many years to get the US NAS going in Australia as after five flights around the world I reckon it's the worlds best.
However I have failed. In fact got about half way there and it's now being reversed with a new requirement that pilots at airports not marked on charts must give their taxiing and circuit calls not on the multicom but on the frequency used by en route ATC in the area! And we have thousands of such airports.