Regulatory capture at work.
Inspector visits the "dirty" bigCo factory and they have an expensive binder for him showing him why everything they do he could possibly take issue is "compliant", citing relevant law, guidelines, specs, etc, etc.
Inspector visits the squeaky clean small time factory and proceeds to write out thousands of dollars of fines for petty things that could have been compliant had the owners had the money to pay to produce all the paperwork showing why their stuff is GTG.
And the inspector and everyone his organization works for say this is all great, and of course they've got self-serving metrics to prove it, because those organizations naturally fill up with people who don't question the premises of what they're doing.
Just about every industry has this going on to a large enough it's a problem degree. It's a pretty f-ed up state of affairs but it won't change because there's so many careers and even entire industries built around it.