I find it quite surprising that shoe-shining is an industry and one that is a serious one, if I might add. However, everything is possible in this world and that shoe-shining becoming an industry in its own, and one that has fended off the recession and all sorts of crisis, is something that is entirely possible. Still, making it professional and making a system out of something as innocent as shoe shining, as this was a profession for those that did not have any education, is definitely something worthy to note.
This is a profession that you may want to consider, that is, once you find yourself jobless and in need of a clean means of living.