A standard rate is a "rate classification". When you add a new employee, instead of choosing "custom hourly rate", you would choose a rate class to be applied to this employee. When that rate class gets a raise, each employee with that setting will receive the raise.
For example, a restaurant hires all new servers at $11.50/hour and assigns them a standard rate of Server1. After their first year, they get a raise to $12.00. When a server is moved up, instead of updating their compensation policy, update their standard rate classification to Server2.
At the beginning of a new year, the restaurant decides to raise all new servers to $12.00 and experienced servers to $12.50. They would update the standard rate on Server1 and Server2 directly, and all servers' compensation policies would be updated at once.