IMHO in order to have "Revenue" you have to produce a good or service that is sold of which you are compensated justly for in the Private Sector.
Their is probably some Accounting Professor here in FR that wants to take me to task so come in the water is fine...
IMHO their is no such thing as Government Revenue it is a transfer payment or a tax, stop trying to sugar coat the meadow muffin...
Unfair analogy...to the muffin, that is.
It one of the evils of government that they have despoiled the word service.
Regulatory agencies such as the Nuclear Regulatory Agency now charge those they regulate for their Services.
A number of years ago when the Congress was trying to cut the deficit they decided the many of the regulators had to pay their own way. They would have to finance their own budgets by charging for their services. So now the NRC and some other regulators at least partially fund their budgets by billing those they regulate or imposing fines.
While on the surface this does not seem like a bad idea because it reduces the need for taxes overall it does give the regulator perverse incentives.
Regulators will take longer to review license applications to increase fees. Regulators will more frequently impose fines for minor infractions. Regulators will increase the number and complexities of regulations to boost the chances of finable offenses.
But yep the government is out their providing invaluable SERVICES (remember the Internal Revenue Service is there to help)