I'd immediately quit my job and get into the house building game. I don't really know what I'm doing but if labor costs halve relative to the price of a home, I'd be rolling in it.
It will be so fun if we turn real life into the game of Monopoly. Oh wait...
The point is the cost of everything can't double while labor costs stay the same because labor makes up so much of the cost of the all the goods we consume.