More Pigeon Holes Than Pigeons

I never would have thought it even remotely possible, Yet it now seems quite plausible, To make a case that is indisputable, There are more pigeon holes than pigeons, And it is all the fault of humans, With no blame attributed to the pigeons. It all started with the invention of labels, And when the pigeons wouldn't budge from their holes, Replica's were made to keep up with the supply of labels. At first things ran smoothly, As governments's moved slowly, With new labels gazetted only twice yearly. One would have thought the citizens' would be glad, Instead they became sad, As a pigeon hole of their very own had to be had. So now there are more pigeon holes than pigeons, Though a shortage of labels is halting the need for even more pigeon holes, As some citizen's feel they deserve the right to several labels.