How do you make sure these people don’t take money and vanish? You tell them half payment before and half after? Then they leave with half and don’t do shit.

How do you make sure these people don’t take money and vanish? You tell them half payment before and half after? Then they leave with half and don’t do shit. You say well I’m going to pay you all after job is done. Well they say fuck you, pay half now or we are not lifting a finger you want something from us not that we want anything from you. Oh how do you track them down and beat them up if they are gone with your half payment? You hire next batch that do the same?