Anything the government is in charge of is corrupt. It is a natural law in Economics. Bureaucrats are making market decisions and their motivations are not market related and even if they were, bureaucrats' incomes do not derive from economic right decisions and they cannot read market signals because they do not see them, even assuming bureaucrats are motivated for "the common good." When bureaucrats make the decisions then businessmen must buy their decisions from the bureaucrats and thus Corruption. It cannot be any other way because the "honest" bureaucrat or politician cannot get decisions made or implemented nearly so well as the corrupt one can and has no way of knowing what economically correct decisions are.
Businessmen are not necessarily honest and most embrace corruption whenever it helps their business. When they have to operate in an unhampered market they are kept honest and socially beneficial by the exigencies of the market. When they are not, they fail. When Bureaucracy defines and controls the market only corruption can succeed or even exist.