 either that the payment system is requiring them to leave a tip or that they're feeling guilted, and this is something we haven't really talked about, is that you feel an obligation to leave a tip. It just actually points to a bigger problem, which is that the way that a lot of folks in the US are being compensated is a little bit off. If they're relying on tips for their salaries, then something is wrong. Those tips should be given for good service, not to subsidize