Earlier quoted context omitted.
It's relevant to nearly everyone who would be interested in the title of the article, though.
how? if profession A gets more demand and pay, does it matter if profession B gets more or less? Is it that damn important if A makes more than B or if B makes more than A?
If I'm choosing to train up for job A or job B, I mean, money certainly isn't the only consideration, but it's certainly a very important consideration.