Yes! And how policy can have unintended consequence is HUGE. Why doesn't he really even mention that? It's upsetting that among the many observations that "people, tip more" ends up being the final thought and not "we created a system that affords all of this behavior, " not one that works with known conditions.

Sure, I personally think people should be more generous, but they aren't obliged to be generous, I don't really fault them for not being more generous, and if lack of generosity is a condition of the system, he doesn't really have a good argument for saying "we crafted a system knowing people aren't generous, please be more generous so our system works."