That whole article sums up what is wrong with these venture capitalist funded start-ups; they want to compete on a different playing field than established companies. They want to be able to import cheap labour from other countries as they aren't willing to pay the going rate for local engineers. They don't want to register their employees properly as they will be liable for more taxes and to give their employees the rights they are entitled to.
As a European, I'm glad these guys are finding it difficult to ride roughshod over the laws has to protect workers. If you can't afford to do things the proper way then your business is not viable. Complaining that you can't find exploitative loopholes that depress wages for the rest of us is laughable.