

I would say that:
-O’Brien keeps the machines running
-Bashir keeps O’Brien alive
-The black markwt keeps the economy running
-Quark keeps the black market running
-Rom and Leeta keep Quark’s running
-Odo keeps Quark in check
-Sisko’s reputation for DGAF ruthlessness keeps the Cardassians away
-Garak keeps an ear to the ground for the rare occasions when the Cardassians dare to plot fuckery
-Keiko keeps the kids from turning feral
-Kira keeps Bajor happy with the Federation setup
-Dax is also there
And he always proudly points out that he himself has never been personally bankrupt. Somehow, the fact that he always manages to bankrupt his investors instead of himself was seen as a good reason why America should become his next big investor.