Clearly they won't ever actually be able to pay the fines, and by extension it's clear that those doing the suing never intend to collect these ridiculous amounts.
Of course the CEOs of these companies intend to collect these amounts. At the highest level, those companies are convinced that pirates make obscene amounts of money off their copies. And I believe the lawyer scum specializing in those kinds of lawsuits are paid or at least credited proportionally to the amount awarded.
In any case, collecting the whole amount is not the point. Ruining the defendants is. It's exactly the meaning of the phrase "suing you for everything you got". The system is set up so that the trial alone could ruin an average citizen - whether they are found guilty or not. And in case someone still has anything left, they'll take that when they collect the fine.
So what happens after they declare you guilty? The fines are so high as to ensure every last penny you own and every last penny you will ever make is going to them. That means you lose everything. Your house, your car, your job. What follows then is bankruptcy, which in many cases means simply a controlled descent into hopeless poverty.
Incidentally, these effects are exactly the same as when an average person comes down with a serious illness in the United States.