Stating the obvious, but you can of course see it as: there are more than enough workers that need the extra money so urgently that they are happy to screw up their health and social life.
Whether they really "need" the money is another discussion.
working in a car factory is highly well paid, definitely way above average (so well paid, costs are too high for German factories). VW Poznan in Poland pays worser but still good amount.
