Stanley Forman Reed,
Esso Standard Oil Company v. Evans…
“ There is no claim of a stated immunity. And we find none implied. The United States, today, is engaged in vast and complicated operations in business fields, and important purchasing, financial, and contract transactions with private enterprise. The Constitution does not extend sovereign exemption from state taxation to corporations or individuals, contracting with the United States, merely because their activities are useful to the Government. We hold, therefore, that sovereign immunity does not prohibit this tax. ”
