We have a very carefully thought out medical standard and method of compliance. It was carefully crafted to meet the political imperative, whilst at the same time being easy to administer, with reference to the aim of keeping it simple and cheap. Medical exams are wasteful of the pilot's time and money as well as being a dubious use of a doctors time. Medicals constitute a disincentive. This is ultralighting, not GA, and this medical system is one of benefits of our system. In return, we accept a two person limit to control fatality numbers, and so the government cuts us some slack. This limit is of course the same whether you fly a Drifter or a plastic rocket. There is no point in revisiting this subject as it was worked out to perfection by the AUF and CAA (CASA) many years ago.
Fred