Bribery

"the practice of offering something (usually money) in order to gain an illicit advantage"

The first question is should I accept it where most or all people do it, so the first answer is absolutely not, it is not moral. But when it becomes part of organization culture and provide better opportunities for whom got it what can do. What must do when your manager or top level officers do ? Leaving the company is a good option if possible.

The worse thing is that you face it in technological company, where you expect the skills & ingenuity is the scale of progress & promotion.

These are just the questions.