The shopkeeper knows that he could give the customer the wrong change, could shortchange the customer and get away with it; at least that customer wouldn't know.
It was a simple matter to give the dogs less food; but it was impossible to make the dogs travel faster, while their own inability to get under way earlier in the morning prevented them from travelling longer hours.
Here, we're talking about giving advice on paying your taxes, and an " all-in-one tax advisor" would be able to tell you, perhaps, how to lower your taxes – how to pay less money to the government.
And especially people who are not considerate, who don't tip well, who are the classic Americans that we think of when they go and travel these places.