I didn't know about that. At my company, the head of HR (3.5x average salary) recently told everyone, "If you want a higher salary, go work at [rival company]." This was onstage in front of ~150 people.
It's true though. Your salary range is determined at the initial negotiations. After that, your salary will only rise with a few percentages. For a real raise, its best to have a new initial negotiation (and shoot for the stars), wheter at a new company, a new department or a new function.
This becomes truer with each passing day, and is a big factor as to why young people job hop so often - if their talents aren’t being adequately remunerated the only redress they have is to find a better job with better pay. It seems strange to me that experience within a company and your tenure of service are no longer being rewarded, but perhaps that’s just another expression of how commodified our labour has become.