&gt; ... but it should be noted that there&#x27;s a leveling-off as well.<p>This is not really true. It&#x27;s a bit of a logish function though.<p>Lottery winners are very happy, but not 10 times someone on $100,000. Just a reasonably bit more.<p>I think one does have to be careful of negatives to get the money though, an extra $10,000 for a 2 hour per day commute I think would not pay off. You can&#x27;t hack the system and rely just on money for happiness.