The Sankin Kotai was a system created by Tokugawa Iemitsu in order to ensure that the daimyo under his rule would have a degree of cohesion. It was also a major pain in the neck for those daimyos, who had to plan for a major pilgrimage to Edo every other year! Moving that kind of distance every few months in the 17th century wasn't easy!
Well when you spend money, 
you run out of it!
¡Si despilfarras, se acaba el dinero!
O dinheiro diminui quando se usa!