I suggest yeshivish invite some of the gvirim to give seminars on how to emter the business world and to succeed there. Even if, in your opinion, a particular gvir is “keeping up with the joneses”, yeshiva bochrim can take the good from the bad.
Maybe, if someone expand to the gvir about maalos tzedaka and then disclose to him the secret (that is usually not mentioned in the appeals to him) that the biggest tzedoka is to help someone with making a living, the gvir can take some of the more aspiring bochrim as apprentices.