newbee: Boro Park (as defined by its frum boundaries) consists of miles of walking, often you will not see a car driving in sight on Shabbos. Whether you have to have it shipped or are otherwise restricted to more limited choices in the competitive marketplace, the net result is higher OOT costs for kosher, Judaica and Jewish clothing. Costco doesn’t sell the least expensive Glatt Kosher, Cholov Yisroel, kosher bakery goods, etc., assuming they carry a single brand of those at all. If one limits themselves to positions outside the city, where salaries on average are much higher than positions on Main Street, they’ll have lower commuting expenses alongside lower average compensation.
OOT also mostly lacks Hatzolah, Shomrim, Chaveirim, Bikur Cholim, multitudes of gemachs, medical and tzedaka orgs, multitudes of rabbonim, rebbes and tzadikim, multitudes of yeshivos and butei medrashim, minyanim, shiurim at all times, subjects and levels, etc.