The Lord blessed them with such a great reward, but they choose to misuse it. They probably forget to pay tithes and donate to Christian charities. Thus, the ruin it causes is due to God withdrawing his blessing on them, due to their misuse and abuse of it.

If I won 1, 5, or 10 mil, I'd donate 10% to the Church, first of all. Next, I'd donate a great, significant amount to "The Navigators" ( http://home.navigators.org/us/ ) in order to finance more missionaries to spread the Gospel in Japan. I'd also take a trip to Japan, Korea, and China, all the while passing out Gospel tracts to anyone I meet. Then I'd go to Japan and help spread the Gospel by also doing it myself.

However you spend your winnings, that's your prerogative, but please remember to thank God for his great blessing, and use it in a way that God would want you to, and he may keep your life full of happiness, thrills, love, and abundance. God is the source of happiness, not money. Remember that.