It is not unusual for boxes 1, 3, 5, and 16 to all be the same number on a W-2. That just means that you did not have any tax-deferred deductions taken out of your paycheck, such as contributions to a retirement plan through your work.
Without more context or information about where you see that message, I cannot say whether the statement about your gross pay being adjusted to produce your W-2 is correct or not.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"