(n.) One who pays; one who compensates, rewards, or requites; specifically, an officer or agent of a government, a corporation, or an employer, whose duty it is to pay salaries, wages, etc., and keep account of the same.

accountant auditor bookkeeper bursar cashier cashkeeper chamberlain compensator comptroller controller curator defrayer depositary depository financial officer liquidator payer purse bearer purser ratepayer receiver recompenser remunerator steward taxpayer treasurer trustee