What did they do with the terumah? With it they would purchase daily offerings, additional offerings, and their nesachim; the Omer, the Two Loaves, and the Panim bread; and all the public offerings.  Those who watch over the aftergrowth of the Shemittah year receive their wages from the funds withdrawn from the [treasury] chamber.  R’ Yose says: Also, one wishing to, may volunteer as an unsalaried watchman.  They replied to him: You too admit that they must come from public assets.