Well it could had in the being over in the ending of his life. Thank goodness a higher power says no not your time yet.
I'm usually ecstatic when I have a lot of money and sad when I have none. The correct phrase should be money does not ensure happiness but it sure can help.
Money is only one of the variables involved in perceptual existence. It does almost nothing in terms of raising people's perceptions of their lives. Extreme poverty can definitely drag a person down. However extreme wealth is unlikely to make them happy. This is because whether you have money or not shit happens and most of the time money only ameliorates the symptoms instead of solving the root causes of your discontents. Being worried about where you are going to find a meal on a given day is indeed a terribly wearing condition over time. So is worrying that your wealth, no matter how much you have of it, is at risk day in and day out as it is with most people.
I think what you have to do to achieve wealth is another factor in that happiness. I have had times of extreme poverty where I was happier than during times that I had moderate to high wealth because during the latter I wasn't happy in in the job I was doing to achieve the money I made. Being currently in a position where I enjoy what I do for a living, not having to worry about bills or a lot of what comes with poverty and being financially able to do things outside of my occupation that I could never do before in either of the previous situations, I'm definitely much happier than when I was. I'm also reminded less of the preposterous nature of the concept of money and how dependant on it our happiness is. I guess the lesson for me is that the more you sell out for capitalism, the less you realize it sucks.