You have to really work to convince me any federal gun law does not infringe. I just paid $400 in tax stamps and $45 for photos and prints for $400 worth of NFA devices. That is crap!
Obviously setting a "tax" (SCOTUS defination or not, it is still a FINE) does not affect criminals who by defination do not follow the law. Only law abiding people suffer the rules, regulations and cost.
It appears that the people voted into public off "to uphold the Constitution" see it as a ultimate form of power to chip away at the Constitution. In the process these politicians form laws that have the surface appearance of doing something good for everyone else while the underlying goal is to create another government office, with regulatory power and financial requirements all while making a name for themselves "on the books".
People generally see the money grab as boring, the govenment offices function outside contest and requlation, apathy quickly allows initial pain to disappear as politicians move onto the next money grab.
It is all about fleecing the sheep under the disquise of doing something good for the sheep.