I know that most of you are too young to remember this, but in 1996 Mesa Airlines was considered the bottom of the barrel with regard to pilot compensation (among other things). Jonathan Ornstein, the CEO, was asked in an interview why he paid his pilots so little.
His response was that pilots show up to fill classes every two weeks so he thought he was probably paying them too much.
The moral of the story is ... (deep breath) Johnny was right. Only now we are seeing the other side of the coin.
I still disagree that here is a shortage. There are plenty of corporate, 135, military etc pilots in the US alone (not counting the thousands of furloughed and expats). The airlines seem to suddenly think that the laws of supply and demand only work in one direction. There is no shortage, there are simply enough options that pilots can be picky. The balance has shifted a bit.
When the regionals start paying market wages for those positions and STILL can't fill classes, then I will acknowledge a shortage.
I know at least a dozen corporate pilots who would love to go fly for the airlines but can't afford the pay cut to do so.