What's most important in a job, the quality of job or salary?

For me, the quality of job is more important. Once you start doing great work, money will eventually start flowing in. The satisfaction of doing a good quality work is far more to me.

 The short answer is that there is no correlation between levels of income and emotional well-being at socioeconomic strata above a certain level. Essentially, once we are at a certain level of security and economic well-being, increases in wealth do not bring greater happiness. Happiness, which is hard to define, is over-determined in psychological terms--there are more variables involved than we can easily tease out, in terms of what makes us happy or unhappy. Studies indicate no particular correlation between greater happiness and greater wealth, though any individual, because of  his or her nature as shaped by genetics and environment, may find greater happiness in greater wealth. Some people born into wealth choose paths of life that minimize the role of money in their happiness. Some people born into poorer circumstances find their core meaning and purpose in the amassing of wealth. But in the aggregate, once one has enough money to be secure and meet one's needs, having more does not seem to increase happiness. Being poor, however, makes people less satisfied and more prone to difficulty across a range of human ways of expressing unhappiness, like drug addiction, crime, early childhood pregnancy, and so on. One might say that happiness does not stem from wealth, but unhappiness is a correlate with poverty.

 There is also a great deal of evidence that satisfaction with one's life work has a greater impact in emotional well-being that wealth does. This only stands to reason. The satisfaction of liking one's job, finding meaning in it, enjoying each day one spends at it, is almost certainly preferably to doing something one does not enjoy in order to reap a marginally greater income. Ironically, the likelihood that one will do well financial in life is actually enhanced if one follow's one's passion, in terms of work, rather than whatever the herd is doing.