The Company has set its own internal policies to manage its workforce in a way that lets them upgrade their employees after that period of time when they consider you to have outlived your maximum potential to them--usually 5 to 7 years. They don't want you to stick around longer than that because you start to get too expensive, complacent, and maybe even feeling entitled. Long are the days of keeping employees for a long time to achieve consistency and quality. They have bet on technology to keep them competitive and efficient, and only a few "chosen" employees are retained to ensure this process runs as intended.
But don't fret, if you acknowledge that USAA has become this type of company, use it to your advantage. Take advantage of all the education and training that you can get, upgrade your skills as much as possible, take on as much responsibility as you can, and you will always achieve success because 1) you will become incredibly marketable and can go anywhere you want and make more money, or 2) you could be one of those "chosen" employees they retain. Either way you win. Think about it.