@demonhunter,
demonhunter wrote:How is this choice considered an ethical decision without one of the options being considered more or less ethical than the other?
I'm not sure to what choice you're referring with the term "this choice". If you're referring to the choice
whether to ration, there is no ethical decision to make because you have no choice. If you're referring to the choice
how to ration, there
is an ethical decision to make because you
do have a choice. For example, if you're a utilitarian or a Rawlesian liberal, you will ethically favor a universal healthcare system with some government involvement, because it's more efficient and more equitable. Or if you're a libertarian, you may ethically prefer the free market because government-run systems require more coercion. Either way, you can evaluate the ethics of choices---because you
have a choice in the first place.
demonhunter wrote:More importantly, is market considered a form of rationing simply on the basis that supply does not meet demand?
Yes. Wherever supply does meet demand without rationing, there is no need for a market. That's why there is no market for breathable air, for example. Markets are institutions for managing scarcity, or in other words, for rationing.