People say that money cannot buy good health, and in some cases that is true. However, it's a well-documented fact that people who are rich/wealthy/solvent/loaded are generally in better health than someone who has fuck-all and is living below the poverty line.
I am talking about people who know they can't have a few weeks off sick, as they won't be able to pay their mortgage/rent/bills, (not everyone gets paid for sick days!) and people on zero hours contracts, who have to ring in to see if there's any work for them that day, and people who are forced to claim tax credits to make ends meet (only to have to pay half of them back over 5 years because they somehow ended up with an overpayment - even though they never had any surplus cash during the time they had the tax credits!) 
People who have always been solvent/rich are generally in much better health in general, and are much healthier by their mid 60s than people who have spent their whole life worrying about money. They also look younger and healthier. I see people who have had money worries their whole life, look ten years older than their age at the age of 50. And they almost ALL will have to work til 67-70.
Even many years ago (100 years or more back) poor people would die young-ish (like by 35-40,) but rich people would live to 70-80+. And even NOW, people die before middle age in very poor countries where they have very little food, and lots of diseases.
People who have had a cushy ride; a well-paid job for life/brilliant final salary pension, or a big inheritance, or who have just come from wealth, seem to give up work at around 50-55 (sometimes younger,) and spend their senior years on cruises, and visiting their villa in Portugal/Spain/Florida. They also have access to much better (private) health care, and have anything that needs doing, done within 1-2 weeks. They don't have to wait for 1 year to get it done on the NHS.
So, like it or not, money DOES buy good health in many cases.
And it's ludicrous to suggest that people won't be happier with more money. Lack of money = more stress and poor health.
As has been said, it's patronising and insulting to people who are poor to say money is irrelavant.