The scale is important, and alters the concept. To the average person, a salary increase of 10% can mean the difference between being able to afford a house or not. To the highly-paid NHLer (I'm not including guys who make under a million/year here), a salary increase of 10% just means luxury beyond what they already have.
I realize it's still different since their peers are all making large amounts of cash so they don't exactly have anchors in the normal world, but their salaries and normal salaries are totally incomparable.
While we're on the subject of the idiotic "take a 10k pay cut at work" argument: athletes are playing for money, yes, but there is a great deal of prestige around being a winning player as well. So in addition to the completely different payscales, they can help themselves by taking a pay cut because it allows their team to be (hypothetically) better. No regular person is going to get an award that anyone gives a crap about for being part of a successful company. Oh, you work for Google? Good for you, I guess. You know who will remember that after you die? Nobody. You win a couple of Stanley Cups as a star player, and sports nerds such as ourselves will talk about you for decades.
To further my wall of text: in the real world, the employers hold most of the power. If they pay you a lot of money it's because they can afford to do it without detracting from the company's performance. In the NHL the players hold most of the power, since without them there is no league. The players have the ability to leverage contracts that absolutely do detract from the performance of their teams (particularly with the cap), making the comparison between them and regular people even more ridiculous.