I think it is wrong. Why would we discount the life of an older person? Because they no longer work? Because they are no longer an asset to society?
We need to treat them as if they will live another 20 years, and help them if we can.
HOWEVER, having said that.....I would stress that the medical professionals be honest with family members and NOT perform unnecessary tests and procedures.
I speak from personal experience. My uncle/godfather (age 74) suffered a stroke and for the next 6 weeks we had him in rehab, with a few hospital visits for various issues. At the end of the 6 weeks, he got very lethargic and the doctor stated he had a systemic infection, etc.
The last days of his life he suffered a transfusion, stomach pumping, central line insertion, etc. The whole time he was not talking, but, would definitely groan when someone poked something in to him....so, he WAS there and feeling it.
On his last day (which we didn't know would be his last) one little Indian Lady doctor came in and took pity on me and my sister who were in the room with him. She looked pitifully at us....and said "You girls do realize he's not going to get better, right?" Wrong! How would we know that unless someone in the hospital had told us? I don't know the test results, nor what they mean.
She suggested we consider hospice care for him, and within 3 hours the hospice nurse showed up and when we were talking with her, he died.
So, not only did he suffer procedures he didn't need to suffer through....long after he passed away, we were still paying the bills for those procedures....that would never have "helped" him anyway....and the hospital knew that.
So, yes, FIX old people if you can....but, do not torture them if you can't.