Of course not la dey. But in rare occasions, some people prefer to deny promotions and just relax at their role for very long. These people may get a lower pay than fresh grads in the same firm as fresh grad salaries will always increase due to market demands. However, experienced professionals may not see their demands increase proportionately mainly due to how much more complex it is to compare and hire the right experienced worker.

Fresh grad very simply, they are all classified into honours. Can see where they interned at, what kind of side projects they took, what kind of business case competition etc they won.