I am not sure why we are spending inordinate effort on an off-topic.
Well I'm kind of hoping a mod will take these last few posts and put them into a dedicated thread about social research methods, because I think it's a worthwhile topic.
If you take a 50 year satisfaction survey, I am sure you will find very favourable results because the base line is off the Cultural revolution/Great leap era where the amount of deaths and suffering was on the scale of WW2. The issue is not about whether China has made economic progress or whether the living state has improved or not.
You're right, the issue is exactly about whether the living state has improved or not -- that is part of the original point that Vincent was making regarding people's livelihoods and satisfaction... however it is about whether the living state has improved from 30 years ago to now.
The way I'm reading it, Vincent's original point fundamentally revolves around the principle that he was talking about the changes China has gone through over the last 30 years, and the degree of change in satisfaction and living conditions that has occurred from then to now.
If you want to argue that such a measure over 30 years is not worthwhile or whatever, then that is fine, however at the same time the Gallup poll you're posting most definitely is not a legitimate counter piece of evidence for the point Vincent was making, because they're talking about fundamentally different things.
Vincent's attempt is simply off-topic when the discourse is about aging demographics and fiscal policies or lack of to a future problem.
I don't disagree that this topic about satisfaction and what not are off topic... but at the same time, the Gallup polls you used are not reflective of the original point which Vincent was trying to make.