"Economic liberalism is a system of economics that describes the organization of an economy on individual lines, which means that the greatest possible number of economic decisions are made by individuals or households rather than by collective institutions or organizations."  Wikipedia, citing Ian Adams, Political Ideology Today (Manchester University Press, 2001).  

Maybe you'd hire the cheapest labor if you were a capitalist, but that isn't always the smartest capitalism.  Smart capitalism hires the most efficient labor --- "the biggest bang for the buck."