As someone who has come extremely close to ending my own life on several occasions (and have since begun treatment), I am inclined to believe that the mentioned

As someone who has come extremely close to ending my own life on several occasions (and have since begun treatment), I am inclined to believe that the mentioned "extra resources and care" are of significant impact. Mental illness was and (albeit to a lesser degree) is a severe drain on my energy and productivity; I believe that for many this may account for the reduced income levels relative to "comparable peers". Psychiatric care coming after an attempt may close this gap in productivity, allowing for increased income. Of course, I speak only of my own experience and cannot of others'. It may be enlightening to compare changes in income based on the presumed basis for the attempt or ideation (i.e. mental illness, economic circumstances, or familial / social factors). I believe it to be especially important to study those suffering from mental illness separately, as illness can beget thought processes severely lacking in logic and rationality; an economic model assumes a level of rationality in the decision-making process that may not necessarily be present.