Interesting...this reminds me of something I heard about recently.
A machinery manufacturing company was complaining that they couldn't fill orders because they were short on staff. They needed apprentices (pref second year), and quick! Somehow with their increasing sales, and their increasing penentration in the marketplace, they failed to notice a need for an increase in staff. That is, they didn't take on apprentices early enough, and no doubt, that was due to "cost".
So, instead of paying an extra $40K pa or so per apprentice before they actually needed them (lets guess they need 3 apprentices) a year before time, they now lose probably that much ($120k) PER MONTH in lost productivity and unrealised production capacity.
To be blunt, they were short sighted and failed to do any strategic planning.
I don't believe for a second that there is a shortage of people willing to take on the trades, but there is a shortage of people willing to take on apprentices, and I can say that speaking from experience. When I was 22 I decided that I wanted to be an electrician, but 22 was to "old" at the time. Now you'd get subsidies and grants coming out of your ears. Nevermind that a 22 year old is probably a lot more reliable and more likely to be committed to the job...