Indian Railway Catering & Tourism Corporation [IRCTC] — complaint regarding bribe and low quality food

I am traveling from chennai to delhi in rajdhani express on 8 sept 2017. Firstly what i see the food is not good and he provide same dal in the night also. The dal is so pathetic. You take much fare in rajdhani at-least improve the quality of food.
Secondly, after completing the journey all the working staff in the train for eg person provide food, person provide bedroll and sweeper also ask for give some money/ tip. I don't understand they are the government employ and why he want such extra tip from everyone in my view government pay for this. I know he is doing such thing in everywere.