Then surely they should be advocating an insurance based system like the ones they wish to work for overseas? If the conditions are so great in Aus/NZ/US then why wouldn't doctors advocate the same financial model be applied in the UK?
Seeing as my daughter just came out of an excellently run NHS hospital I can't help but suggest people like you should move to somewhere where private healthcare is the norm. We (as in much of Britain) love the NHS.