Let's be clear about something here. These are most likely not organic Trump picks. This is about the biggest donors getting their quid pro quo in the form of cabinet picks due to regulatory capture... and leaks of the Obama admin indicate the same thing happened with him, the same with Bush before him, and likely with presidents for a long time. With Obama it was citigroup who got most of the picks if I remember correctly, but with Trump it seems to be a bit more varied. (Eg Eric Princes sister for Education Secretary, etc)
Edit: I'd appreciate dialogue instead of just down votes. To clarify, by saying Trumps picks were a bit more varied I wasn't saying it was any better than bankers picking almost all of them.
The realpolitik response I usually hear is how only industry experts at a high level can fill these positions, but I simply no longer buy this argument.