Raises happen when minimum wage goes up, or when the employees are finally so stretched thin by the company's constant expansion that they physically can't staff all the trucks. In that case they pay new hires more than those working currently in order to get new warm bodies in the seats.
Raises are given when deemed appropriate and at a frequency that is above the national average for our career field. Don't be a millennial snowflake; work hard, be professional, and prove you DESERVE a raise before asking for or demanding one.
They provide raises only when they cant hire anyone and many people have left