You say this, but you offer no evidence to contradict the study, which is based on ... evidence that you're wrong.
But think about it: A single person making $105k is just touching the top 10% of income earners in the US: https://dqydj.com/income-percentile-calculator/
Having spent some time in about that bracket in an average cost-of-living area (earned slightly more, but I'd spent the previous few years being a broke grad student), I can attest that it felt amazingly rich - there were few things I would have done with more money. My life satisfaction came from my job, my relationships, and my hobbies.
There's a lot of evidence supporting the general conclusion that happiness is either logarithmic in income, or asymptotic after a point. Just blowing it off as "a joke" doesn't hold water. There's also considerable evidence that things like friendships, family, good relationships with neighbors, etc., are much more important contributors to happiness than income.
But think about it: A single person making $105k is just touching the top 10% of income earners in the US: https://dqydj.com/income-percentile-calculator/
Having spent some time in about that bracket in an average cost-of-living area (earned slightly more, but I'd spent the previous few years being a broke grad student), I can attest that it felt amazingly rich - there were few things I would have done with more money. My life satisfaction came from my job, my relationships, and my hobbies.
There's a lot of evidence supporting the general conclusion that happiness is either logarithmic in income, or asymptotic after a point. Just blowing it off as "a joke" doesn't hold water. There's also considerable evidence that things like friendships, family, good relationships with neighbors, etc., are much more important contributors to happiness than income.