Oddly, that part came mainly from capitalists; the early-20th-century Marxist idea of "scientific management" of a centralized industrial economy was closely modeled on scientific-management ideas from large industrial conglomerates.
There was a period when large industrialists were arguing that having many competing companies is inefficient, and instead managing a large, integrated industrial sector via scientifically/mathematically sophisticated methods was the future. That was one argument against anti-trust laws: that breaking up large companies would just decrease efficiency. The only thing the communists really disagreed with was what should be done with the profits of these trusts.
There was a period when large industrialists were arguing that having many competing companies is inefficient, and instead managing a large, integrated industrial sector via scientifically/mathematically sophisticated methods was the future. That was one argument against anti-trust laws: that breaking up large companies would just decrease efficiency. The only thing the communists really disagreed with was what should be done with the profits of these trusts.