Eh, I remember reading somewhere that the "let them eat cake" comment was one of the most misunderstood comments ever made.
If I recall correctly, day old cake sold for much less than day old bread ... because since there was no crust on the cake, it tended to go stale sooner.
So, if there was no bread for the poor to buy (or that they could afford), there was very likely to be available and affordable cake.
That's as I remember what I read anyway ... but you watch, I will have totally messed it up (sort of like with three sheets to the wind).