Call your state congressman, senator and trades group. This got so bad in Oregon they had to pass a law called 'cite it write it'.
In addition to any other requirements set forth in statute and rule, all building officials, inspectors and plans examiners certified under Division…
oregon.public.law
It requires inspectors to provide a written memo with an exact reference to the applicable code section.
Its a great law.
So here they cant say 'boxes not installed'
they would have to cite 300.15 'a box or or conduit body shall be installed at each conductor splice point, outlet point, switch point etc..' and metal box grounding 314.4.
Typically they would say "agency policy XYZ to see all the equipment grounds made up and tested before cover is approved."
So to get passed you'd have to provide some temp boxes or splices for a test, and perhaps some specs on the light fixture that its listed for that many conductors at that temp rating, and reassurance that the inspector will be able to access the box on the final.