Depends on your lifestyle. If you spend all that money, it will be a problem. If you enjoy a bit of luxury while it lasts and save 50%+, you'll enjoy riding the wave and won't mind the inevitable crash as much.
Sure, it can be more, or less of a problem. I've always done what you describe, and it's helped immensely in terms of not being too worried about this kind of thing. But even with a 50% savings rate, you might still prefer to not be out of work :-)
Obviously, anyone want's to keep making good money :) But if you successfully avoided lifestyle inflation, a drop won't hurt as much and you've probably taken some proper savings from the good years, so the benefits (like earlier retirement) will last.
