Does the U.S. allow no radio no transponder light sport types access to Class E airspace as we do?
Class C requires all aircraft to be in contact with ATC and have a clearance.
Class E does not.
Therefore to me, Class C provides a higher level of safety than E.
A number of aeronautical studies by CASA have stated that a Class C service can be provided v.s. Class R for no additional cost. Neither Airservices or Civilair have come out and disputed it, and I suspect the reason is the opinion came from ATCs and ASA in the first place.