One of the more important issues in regard to personalia in the NT, is who exactly was this Erastos mentioned in Rom. 16.23 and what was his job. He appears to be a convert to the new faith, presumably via Paul, and he lives in Corinth or one of its seaports, where Paul is currently residing. He is probably the same person mentioned in the famous inscription ‘Erastus pro aedilite S.V. stravit’ found in front of the stadium in Corinth (I’m not buying the recent theory that the stone was moved to this locale from somewhere else and probably refers to a second century Erastus). The inscription means ‘Erastus for the office of aedile paved this parking lot’, to put it colloquially. In other words, he performed a public ‘liturgy’ (leitourgos) a public service as part of his campaign to show he was civic minded and would make a good aedile. The term Paul uses to describe Erastos in Rom. 16 is ‘oikonomos of the city’, so clearly not a household steward of some wealthy villa owner. Here is what Strongs says about the meaning of ‘oikonomos’
“Luke 16:1, 3, 8; ὁ οἰκονόμος τῆς πόλεως, the superintendent of the city’s finances, the treasurer of the city (Vulg.arcarius civitatis): Romans 16:23 (of the treasurers or quaestors of kings, Esther 8:9; 1 Esdr. 4:49; Josephus, Antiquities 12, 4, 7; 11, 6, 12; 8, 6, 4).” In short he was the city treasurer, among other tasks. Lindsey Davis for example describes the panoply of his jobs to include the following— repair of temples, sewers, and aqueducts; street cleaning and paving (see the above inscription); traffic regulation; tending to dangerous animals, dilapidated buildings and other fire hazards; superintending the baths and taverns; enforcing anti-gambling and usury laws; the care of public morals including prevention of foreign superstitions. (L.D. in her ‘The Ides of April’ pp. 124-25). It is this last bit that is of interest to me at this moment.