Helot

[…] when one of their kings dies, not only the Spartans, but a certain number of the country people from every part of Laconia are forced, whether they will or no, to attend the funeral. So these persons and the helots, and likewise the Spartans themselves, flock together to the number of several thousands, men and women intermingled; and all of them smite their foreheads violently, and weep and wall without stint, saying always that their last king was the best.

Source: wiktionary

A man who conceives and writes a great book, my friend, has done more work than all the helots that laboured on these pyramidal futilities.

Source: wiktionary

All wore a costume suggestive of a more tranquil and prosperous age than this — Dame Clara Butt singing, in a voice not quite so deep as Arumugam's, 'Land of Hope and Glory', the gold squeezed from tropical helots enhancing the upper-class comforts of a cold climate.

Source: wiktionary

“In part, the blame falls on the corporate elite,” Barbara Ehrenreich wrote back in 1989, “which demands ever more bankers and lawyers, on the one hand, and low-paid helots on the other.” These low-paid helots are now unpaid interns and networked amateurs.

Source: wiktionary