If you look closely, you will realize most of these operators are a group of people who pool resources and even crew (the operators are Somalis mostly). They own most of these companies and hire mostly from the same ethnicity. (Now try getting a job if you don't fit the criteria). They also share resources in terms of maintenance etc.
Secondly, Most fresh-out-of-school pilots (relatives, friends) with 200 hrs pay for their own type rating (Approx $35,000 on Dash-8). Most of these guys get into flying school knowing they have a job waiting.
There is also the money-laundering aspect from piracy in Somalia and other sources (smuggling etc). Let's not even get into that!
Waiting for the lashing for telling it how it is