Precisely. This is not about equity or revenue. If it were, a small increase in fuel tax would take care of it.
This is about increasing the size of government, as a new FAA bureau would be required to track the flights. Then, each aircraft would have to be "registered" with the system (separate from the aircraft registration requirements), plus people to track flights and operations, plus QA folks, plus supervisors and managers, plus collections, plus lawyers, plus an appear mechanism, plus lawyers to prosecute appeals, and staff to handle the letters and phone calls, plus more HR, and finance folks, and on an on. And then the fee would have to be increased, to create revenue over and above the cost of the running the operation.
I work in government, I've seen this movie before.