The problem with that is that is shifts the burden from the clerk to the company. Right now, these places can claim ignorance and/or take whatever is the highes

The problem with that is that is shifts the burden from the clerk to the company. Right now, these places can claim ignorance and/or take whatever is the highest moral high ground. At that point, the company itself is under scrutiny in the public eye. They can't blame their front-line staff.