I'm sure you have a point about the tax
Re laws and regulations: unfortunately they are there to guard against the unscrupulous - look what happened when banks were de-regulated: a bunch of greedy, immoral a-holes basically took advantage and wound up taking down the entire global economy
All it would take is one of these dining groups to start serving dodgy chicken (or whatever) and one person die from food poisoning and everyone would be screaming about city agencies failing to do their job.
Same reason we have speed limits - you may be a great driver who's in perfect control at 90 mph, but what about the eejit in the clapped out jalope trying to keep up with you?