Whether the receivers, as parties required to pay the processing and floor taxes, had standing to challenge the Agricultural Adjustment Act's spending program.
Holding
Yes. The receivers could challenge the exaction because the purported tax was an integral part of the allegedly unconstitutional agricultural-production scheme.
Reasoning
The Government argued that the respondents were merely taxpayers objecting to the later expenditure of federal funds, an objection ordinarily barred under Massachusetts v. Mellon. The Court distinguished that situation: the respondents were directly required to pay the assessment and resisted it as part of the very statutory program alleged to be unlawful.
The Court rejected the Government's attempt to treat the Act as two unrelated laws—one raising ordinary revenue and another independently appropriating funds. The processing tax automatically began when benefit payments began, ended when they ended, was calibrated to the gap between current farm prices and the statutory parity price, and was dedicated entirely to the agricultural-adjustment program.
In practical operation, the levy was not an ordinary revenue tax for the general support of government. It took money from processors to fund payments to farmers who would reduce production. Because the exaction was the indispensable means of carrying out that regulatory plan, the processors could contest the constitutionality of the whole scheme.