That’s one of the basis of liberal economics.
Market is perfect and and self regulating. the difficulties come from the interference of men and bad governments.
And it it the same at the individual level. All people must be free and equal in front of the market. Only the individual efforts and wise decisions make the difference.
Being more on the side of Marxism, I don’t agree with these theories.
Warning : liberal with the classical meaning, referring to economical theory.