I live near Seattle where $100K is probably a reasonable income (give or take $30K).
Now, I make more than that by a large margin where my cash target side of the house is roughly $300K not including stocks. I live pretty well, so what do I do with the extra money?
Well, I trickle down. I have four employees for my house and land. When you not only provide for yourself, but you provide for others then I claim that there is extra happiness to be had. My house keeper, for instance, makes $40K with an average of 20 hours of week, flexible timing, and a monthly stipend for benefits.
You can buy happiness, but only if you spend it on people rather than things.