Career Change

I need a career change.

I just found out that someone working in HR for 4 years is earning 50k a year. Much more than me working in IT for 5 years. And he is working in public sector, which usually don't pay as well as private sector.

Why is it that HR, who does nothing daily, well at least in my company they don't do anything, gossips the whole day, have little impromptu gatherings all over the office, gets paid more than me, who is on standby for 24 x 7, supports clients in weird hours of the night, who actually goes out and bring revenue to the company?

I need a career change.