And he would not (o de ouk hqelen). Imperfect tense of persistent refusal. Till he should pay (ew apodwi). This futuristic aorist subjunctive is the rule with ew for a future goal. He was to stay in prison till he should pay. "He acts on the instinct of a base nature, and also doubtless in accordance with long habits of harsh tyrannical behaviour towards men in his power" (Bruce). On imprisonment for debt among the Greeks and Romans see Deissmann, Light from the Ancient East, pp. 270,330.