The whole point of life is to maximize your emotional income. Getting that ball and going is a tremendous physical thrill, an ego thrill, a personal power satisfaction.
Source: tape of meeting in Sacramento, CA, with Rich DeVos, Jay Van Andel & many others, c. 1979-1980. Tape was recorded privately and is in the public domain.
The only inequalities that matter begin in the mind. It is not income levels but differences in mental equipment that keep people apart, breed feelings of inferiority.
Our federal income tax law defines the tax y to be paid in terms of the income x; it does so in a clumsy enough way by pasting several linear functions together, each valid in another interval or bracket of income. An archeologist who, five thousand years from now, shall unearth some of our income tax returns together with relics of engineering works and mathematical books, will probably date them a couple of centuries earlier, certainly before Galileo and Vieta.
Hermann Weyl (1885 - 1955)
Source: The Mathematical Way of Thinking, an address given at the Bicentennial Conference at the University of Pennsylvania, 1940.