Why on earth would you assume that? Middle Ages aristocracy lived comparatively miserable lives - no daily hot shower, no climate control, nothing resembling health care, no running water or sanitation, no access to information, no international supply chain for food or products (eat only what your community can preserve for the winter). I would wager that any of those aristocrats would gladly amputate their limbs to live as an average person today.

Interesting to think of, let's say, one of our society's upper class given the opportunity to be a 'regular' person X years from now. Rejuvenation, instant cure for any illness, pain or wound, immersion into world spanning super intelligence, gratification of any physical or emotional desire, personal host of robotic servants, etc. The price is that they would be regular, that is, devoid of superior wealth or power. Would they take it?