People can change the volume, the location and the composition of their income, and they can do so in response to changes in government policies.
“To this wonderful page in our country's history another more glorious still will be added, and the slave shall show at last to his free brothers a sharpened sword forged from the links of his fetters.”
“For since the fabric of the universe is most perfect and the work of a most wise Creator, nothing at all takes place in the universe in which some rule of maximum or minimum does not appear.”