Yes it is up to the wife if she is paying. But it is not up to the wife to demand other people's money to satisfy her religious or other principles.
The wife has every right to require the Canadian health care system to pay for her husband's treatment IF he expressed the wish that extraordinary measures be used to keep him alive. But if she doesn't have a power of attorney for personal care and there is no evidence that HE wanted this done, she's on shaky ground.
Hospitals are now asking patients what they want done in the event of "unexpected consequences" before any procedures now, and patients sign forms outlining their wishes before the procedures, just because of cases like this one.
The Ontario Care and Capacity Tribunal - the so-called "death panel" does exist, but its role is to determine whether or not the patient is capable of making their own decisions, and who has the right to speak for the patient if the patient is incapacitated, not to decide who lives and who dies. They mediate between family members if one family members wants to pull the plug and others do not.
My ex-mother-in-law's children were involved in a dispute at the end of her life. She had made her wishes known to her oldest daughter (a registered nurse) and given her a power of attorney for personal care, but her sons objected to pulling the plug and accused their sister of wanting to "kill their mother". In such a case, the Care and Capacity Tribunal would have clearly decided that the daughter (a) had the right to make such a decision; and (b) such decision was in keeping with the stated wishes of the patient when she was fully capable of making such decisions.
In cases where there is no power of attorney and there is
clear evidence that the patient did not want extraordinary measures taken to save their life, the adjudicators (panel of 3, minimum), can decide to pull the plug, but only in cases where there is compelling evidence that this was the patient's wish. That's why hospitals are now asking these questions before any procedure.
That's not the same thing as the government deciding who can live or who dies, as suggested by posters in this thread.