All I see in this study is the reflect of blackmailing used by society to make us kneel. They want to force us to act decisive, be serious, focused and competitive... all those things don't lead to personal happiness, harmony, better life or a meaningful/wise life. Some people just don't give a shi*t to know who they are and what they represent in this world. They don't care about the hows and the whys in this universe. They don't seek overall peace. Things are much more easier for them then.
In this chart I find that INTJ and ENFJ are the most balanced overall , because they surely know how to live a good/ balanced life all in all.... So for me they are the big winners.
And another thing is that money doesn't make people happy; there are many other things to factor in , such as health( E*TJ tend to be stressed out and burned out, thus with increased overall cardio-vascular risk: heart strokes, migraines, chronic back pain, highly medicated, stress, gastric aches,..Etc!), free time( ENTJs don't have neither, they live for their jobs!), family time( ENTJ don't have neither!), hobby time, general knowledge,..Etc
So, what we should do next is to build a study about " the overall happiness/ life satisfaction per MBTI type". I'm sure INTPs would arrive higher(and INTJ even higher) ,...maybe!