Published in the European Journal of Health? So what does this have to do with US workers? The salary figures are meaningless unless you know the cost of living of the worker's location. $47k goes a lot further in San Antonio than it does in New York or LA. It's intuitive that the less you earn the less power and control over your life you have. More educated, higher paid people have more options and are more contented with their lives up to a point. The pot of gold is out there but you have to go get it. Many who don't go for it blame external events for their unhappiness.

It's only going to get worse...

Get ready for everyone to have heart problems because we all seem to be doing that now a days...