Earlier quoted context omitted.
This might work: x = gross_income / median_income; if( x Math.ln() is the log function for base e, and Math.li() is the logarithmic integral function. The constants are based on the income at 50 times the median income having a marginal tax rate of 50%, and the median income having a marginal tax rate of 0%. Marginal tax rates above 50% asymptotically approach 100%. There are no loopholes or exemptions. If the median…
There's one fly in this socialist ointment: all the rich people will immediately bail, and go live elsewhere.
Your argument rests on the presumption that the economy needs super-rich people to be performant, when corporations and governments have already solved the problem of collaborative concentration of capital. If they leave, and the economy somehow fails to collapse, they have shown the lie behind rich folks as "job creators".
Economies are run by the people who do the work. Sitting on ass and writing checks serves to weed out some of the worst ideas, and shuffling financial instruments serves to lubricate the gears of the economic machine, but should the rich ever go on strike, they will immediately lose all their leverage as the economy restructures itself to work without them. At worst, they can just get replaced by newly-minted rich people.