Don't buy this

The wife has decided to tutor the kids on the fine art of playing Monopoly. Here is a conversation I overheard:
Wife: Remember, in my strategy guide titled How to Crush your opponent and then laugh maniacally while they are poor and homeless, I told you to buy EVERYTHING you land on then double the price and start pimping your opponents. Kindness is weakness, crying is for wussies! The only good transaction leaves your opponent bloody and under your boot heel.

With this kind of tutoring, how can they possibly lose?