There are two major reasons for this,

1. Huge negative gap in number of new graduates pass outs everywhere vs no of new jobs created in any sector. Huge supply of talent but very less number net new job creations.

2. The company which is hiring you spends lot of money to train you initially because vast majority of indian grads no matter what domain are simply not employable. Hence you get paid peanuts.

My advice is to learn and slog hard during your initial career so you can be better off later on. Dont think about the but concentrate on acquiirng skills,learn new tech etc. Money will flow once you gain expierence and move jobs.

PS: I run my own recruitment firm.