Glass and class

Once upon a time all window glass in common houses would feature these broken lumps in the panes. These were the rejects from the process and fit only for the middle and lower classes. The upper crust of society would get the flatter sections of glass nearer the edge of the disk.

In fact the phrase upper crust also tells a story of rank and privilege. In the past bread was sliced horizontally, to the upper crust was the part of the loaf that didn't have grit and charcoal from the oven in it, therefore the richer members of society had that. 

The class system eh? What can you do about it?