I suppose that benefits them on both sides of their marketplace: the # of less price sensitive consumers in the upper class increases and the # of (educated, reliable, service oriented) people available for cheap on demand labor in the lower class increases as well.  The hourglass distribution is a nice tailwind.  I wonder how many young people are temporarily part of the demand equation when they are working 24&#x2F;7 for a high wage and have no dependents and a low to zero (or negative) savings rate.  From watching my friends it seems that once you have a child your attitude towards expenses and savings changes dramatically.