Some years ago someone did an extensive survey on how much more money people thought they needed to live comfortably. It was 'enlightening'. From the poor people up to the 6 figured ones, they all said they needed 10% more. Very few were comfortable with what they already had.
According to economic studies, money can buy happiness, up to a point. Generally, after about 80k-90k the effects of more money on happiness begins to diminish. As I recall, after about 150k more money didn't make a real difference.