πληρωτέον
From LSJ
κρατίστην εἶναι δημοκρατίαν τὴν μήτε πλουσίους ἄγαν μήτε πένητας ἔχουσαν πολίτας → the best democracy is that in which the citizens are neither very rich nor very poor (Thales/Plutarch)
English (LSJ)
A one must fill, Gp.6.2.4.
Greek (Liddell-Scott)
πληρωτέον: ῥημ. ἐπίθ., πρέπει τις νὰ γεμίσῃ, Γεωπ. 6. 2, 4.