Complex sentence: Impressive national statistics tended to hide the existence of deprived pockets within the population and the most deprived population group has been the plantation labor which had been economically, politically and socially deprived.
Split into simpler sentences: Impressive national statistics tended to hide the existence of deprived pockets within the population and the most deprived population group has been the plantation labor. It has been economically, politically and socially deprived.