[Ari_Rahikkala]

Stories like this might as well be titled "Local change in Earth's magnetic field causes objects to float in the air". They shouldn't be read and then disputed because their details don't match the facts, they should be laughed out of the room based on the title alone. The forces they suppose to be relevant just aren't anywhere even close to the brute economic logic that actually governs how many people are willing to work in a field.

If companies want to employ more roofers, they should pay roofers more. It turns out that they will find more roofers that way. If they can't afford that... then we as a society didn't actually want that much roofing done in the first place. Or teaching, or farming, or programming, or whatever kind of job this story happened to be about again.