Your question is very very valid nazli but its answer is still awaited from economists to the satisfaction of 80% of poor of the world who own only 20% of world income.
This question was first asked after 1950s when people realized that majority of people in world dont even have basic needs fullflled.

This capitalist system has become so complicated and have fixed its jaws so firmly and brutely on the poor of this world that only God can change it now---and that tooooo through mirracles. Because the basic principle of this system is EXPLOITATION.

You know europe has nothing of its own.......These nation have ruled the world through there military might in past and stole all there resources and made their own empires in the world.

Pary to God and play ur role atleast.

Regards