hireling

palkollinen puhekieltä an employee who is hired, often to perform unpleasant tasks with little independence
1848: William Makepeace Thackeray, Vanity Fair

When my poor James was in the smallpox, did I allow any hireling to nurse him?

... it may be truly affirmed that no kind of men love business for itself but those that are learned; for other persons love it for profit, as a hireling that loves the work for the wages;