Jamieson, Fausset and Brown on 2 Corinthians 11:8

8. I robbed--that is, took from them in order to spare you more than what was their fair share of contribution to my maintenance, for example, the Philippian Church (Php 4:15, 16).

wages--"subsidy."

to do you service--Greek, "with a view to ministration to you"; compare "supplied" (Greek, "in addition"), 2Co 11:9, implying, he brought with him from the Macedonians, supplies towards his maintenance at Corinth; and (2Co 11:9) when those resources failed ("when I wanted") he received a new supply, while there, from the same source.