hatchet man
noun /ˈhætʃɪt mæn/
/ˈhætʃɪt mæn/
(informal)- a person employed by an organization to make changes that are not popular with the other people who work there
“刀斧手”(受雇进行不受欢迎的改革的人) 词源late 19th cent. (originally US): figuratively, from an early use denoting a hired Chinese assassin.