taillable et corvéable à merci

Etymology
lit. 'to be liable to tax and to forced labour at will'. During the Ancien Régime, anyone who was not clergy or an aristocrat – namely, the commoners – had to pay taille (land tax) or do corvée (forced labour).

Adjective

 * 1)  heavily taxed; enslaved to do onerous work
 * 2)  exploitable endlessly; at the beck and call of; at one's bidding

Usage notes
Often preceded by in a sentence.