To play Devils Advocate for a moment - not all puppy farms are bad - just nearly all! I have visited one which seemed to be doing a good job for all the animals young and old I must admit I could not find fault.
If you were allowed to visit it is highly unlikely it was a 'puppy farm' - more likely someone who has taken up breeding as a way of making a little money but still looks after their dogs - you said "seemed to be doing a good job for all the animals young and old I must admit I could not find fault". I used to be friends with someone of that ilk on here and wouldn't never class them as a puppy farm.
A lot of people try to make money from breeding dogs an can only succeed if they reduce costs or increase the selling price. The only way to increase the selling price is to have winning dogs in field or bench - or find stupid/gullible buyers. Reducing costs is done by not feeding adequately, not weaning early, not attending to illnesses.
I agree entirely that all breeding should be licensed and that it is high time our MPs pulled the finger out! And that includes our illustrious 56!!!!!