Why experience people not given hike and freshers are hired as thrice as the exp. salary?

I don't understand why this happens the one who joined recently don't have any experience who is junir associate who gets paid more and more and when the senior asks for an hike which is always being judged by the managers who never wanna give hike and show partiality and gender bias and politics like same caste people will be getting hike. when the person who supposed to give hike is never responding to you giving you filthy reason forr a decent hike. What's the point of working there?? * * * * Do anyone relate to this situation?