My take on Georgi keeping his finances and how much he makes from his job to himself is that Darcey will blow or at least try to blow through his money and he’ll be left with no money. It’s no secret that Darcey is not financially savvy and spends all her money (and dad’s money) on frivolous things. She doesn’t even own her own home in America with all the money she’s had access to. As an immigrant who has moved to America for a “better life”, Georgi will be less eager to blow through his funds like she does. Given this fact, he just hides his money and lets her blow through hers and then get more money from her dad to blow through (while enjoying things with her) meanwhile he is saving for the “American dream”. As for Florian, he doesn’t work and is a “sugar baby boy” of some sort so he doesn’t have the same “feelings” as Georgi to save the money he works hard for.