I've seen it happen to myself on numerous occasions, and people I've met in the industry. Once you've signed on the dotted line to work at some company (especially the mid to large sized ones), and you can count on 0% to 5% yearly average salary increases.

If you think this is keeping up with inflation, you have no idea about real cost of living inflation in North America; however, you are aware of it subconciously, because year after year, your buying power deminishes. Even CPI isn't a good indicator, and 5% increases don't even begin to cover it.

So what's one to do? Squeeze all the training you can get out of your existing company, and start looking elsewhere. I've averaged 10 to 30% pay increases each time I jumped ship for 5 jumps in a row. Also, this isn't like other fields where jumping ship ever 2 or 3 years will kill your career; if anything, it improves it quite a bit, because each time you get to see how IT operates at a different company and you learn far more than you ever could sticking to the same corp for 10+ years. Also you get to start fresh... all those mistakes you made in the past? Wiped clean, and all the great stuff you've done, hey it's on your resume isn't it?

Think about it, and don't wait around for HR to get on your side... because odds are, they won't.