By your own logic, do you tip every grocery store cashier? Do you tip your landlord? Do you tip the toll collector on the highway? Tipping everybody who you ha

By your own logic, do you tip every grocery store cashier? Do you tip your landlord? Do you tip the toll collector on the highway? Tipping everybody who you hand cash to is crazy. And the US is the only place where you have to do it for a large percentage of that population.