In government language it is. “Revenue” is either taxes or fees. The government is not in the business of producing goods or services to create revenues. They can only tax or fee it in to existence.
(I guess they could sell land and buildings but that would probably account for about 5 minutes worth of debt).
But what about the whole idea of the Laffer curve and increasing revenue by reducing tax rates as well as the idea of improving the job climate and therefore creating more taxpayers and therefore more revenue?