| I don't think anyone contests the fact that money increases happiness _up to a point_. Once you have full financial security though, it becomes quite nonlinear. Outside of bonkers areas, 1 million NW gets you retirement. 10 million NW gets you that plus... toys. It's a major reason why taxation should focus on the rich (as opposed to the 'well off' e.g. high incomes). They really will not notice it aside from ideological opposition. |
In America, the top 1% paid 45.7% of total income tax in 2015 [1] (earning 17% of "expanded cash income"), so you're already talking about a rate over proportionally double.
[1] https://www.cnbc.com/2015/04/13/top-1-pay-nearly-half-of-fed...