It is the point because the $200 doesn't fund the operation.
You have to remember that $200 is supposed to be a deterrent to people actually getting NFA items. Be glad it hasn't been increased over time. If you want lower wait times but would rather spend $3500 per tax paid application, there would be significantly less applications so the times would be much lower. There would also be very little market, and likely no innovation or product choice. But at that price, I could see a lot more 07/02 licenses being applied for.
It's all about volume. The way I understand it, all NFA items (not just retail market) go through the NFA branch. Every item for military or police (including machine guns) has paperwork. That demand is going up, paperwork is going up. Honestly, I'm not sure I'd like to see the cost of processing all the forms, it might actually be more than all the individual taxes and SOTs that are paid each year.
The only way to reduce wait times at the moment is to make the process better. It's a database/registry and it has to be maintained and correct. Eforms is a start, but it's not mature.
Silencers not being NFA items would also be good. No NFA would be better.
To keep slightly on 15-22 topic, I did submit an eform Form 1 to SBR a 15-22 in August when eforms first became available. It went to first pending immediately, shaving off anywhere from a few weeks to a couple months that it would have taken to just get through the data entry portion of a paper form. At that time the wait was about 9 months. With the eform process I was hoping it would be closer to 7. Now that the times are being reported as 15 months for paper, I have no idea when mine will actually be done. Hopefully within a year from now.