North bore most of the invaders attacks and became more complexed for ab 1th.yrs,while the niceties of Hinduism remain undisturbed in south,hence is the difference,where more tilt is service oriented than for self acquisition.

Work culture is there in the mind of peoples there

South indians are more hard working and politicians there have been better then north indians..........also south indian politicians have been less involved in central Govts so they have focussed well on there home states................