The situation in its entirety will not improve unless the authorities decide to take action. Many of the cases you mentioned may even be down to lack of proper training. Again its up to the authorities to find ways and means to train these people. To set standards on health, sanitation and safety even, to conduct regular checks. In the absence of such checks and balances, the status quo will be maintained. You just cannot expect pet stores to set standards on their own. As you rightly said, they are after money and that by itself isn't necessarily a bad thing as long as there are set guidelines and minimum standards imposed on all the pet stores.

In the absence of any such guiding principles, I don't think it is fair to single out any single operator. But then someone can prove me wrong, may be there is a code that we are not aware of. If there is, then you or I could walk up to a store and threaten them that they are violating a certain health or sanitation standard and threaten to report the matter and maybe things might change.