The healthcare system looks at the person's age as being a factor as to whether they authorize any major procedure, whether it be heart surgery or knee/hip replacement. I had a former client who was 84 and needed a hip replaced. OHIP stalled him for over a year and just kept him drugged up, hoping he would just croak. But he said f that and went to the US and got the hip replaced. He's still alive today in his early 90's.
One of the main issues with delivery of public goods is the free rider problem. This occurs when one derives a benefit without paying or under paying for it. This results in inefficiency and scarcity of resources as a whole. That results in the provider of the public good or service being selective on who gets priority delivery - a 45 year old who has 20 years of working life remaining to pay taxes into the system, or the 85 year old who is getting CPP and OAS but is paying less tax into the system than what he is getting in benefits. It sucks but it is the reality in our current system.