Richard Nixon actually said...
It is hereby ordered that income tax returns made for taxable years beginning on or after January 1, 1967, of persons having farm operations shall be open to inspection to the extent readily available in the Internal Revenue Service (for the purpose of obtaining data about such persons' farm operations) by the Department of Agriculture as may be needed for statistical purposes only.
Context
Executive Order 11697—Inspection by Department of Agriculture of Income Tax Returns Made Under the Internal Revenue Code of...
01/16/1973