Running away does not solve problems
Throughout the book the walls have been moving away once there’s an issue (have to go to court, haven’t paid bills), but wherever they go there are always new problems that pop up or the problems they already had have reoccurred.
alcoholism creates more problems than it solves
Some people think that alcohol will make them forget about how bad their life is, but instead it forms an irrational, rude, impulsive, uncommitted, father which leads to problems in the family. This happens throughout the book when Rex comes home drunk after having spent all his money on alcohol. Each time he comes home drunk something bad happens: he burns down the christmas tree, he gets in fights with Rose Mary, etc. Also, alcoholism caused Erma's liver to become bad which killed her.