WHAT IS THE OPTIMUM INCOME TAX RATE?
What is the maximum income-tax rate that anyone should be expected to pay?
Some questions are never settled, in part because people often ignore the theoretical and empirical evidence, and history that can help answer the question. The question of what an optimum income-tax rate would look like is one of those questions.
Rather than attempt to answer it, political demagogues merely shout: "It is only fair that the rich pay more."
Back in 1971, a Scottish economist by the name of James A. Mirrlees wrote a groundbreaking paper, in which he attempted to answer the question of what an optimum income-tax regime would look like if one desired to reduce inequalities while at the same time not discouraging work and economic growth.
Up to the time of Dr. Mirrlees' work, no one had been able to figure out the optimum trade-off between equality and efficiency. Dr. Mirrlees was awarded the Nobel Prize in economics in 1996 for his work, and was knighted in 1998. Here is what he won his Nobel and knighthood for.

