I worked for a call center for a few years, first job once I was done with school. A lot of the people who were hired were simply shipped in by the local unemployment agency. After being unemployed for X days, the government simply offered to pay parts of their salaries for six months as a means to stimulate local employers to hiring more people.

The result was that various firms like Teleperformance and the like placed call centres in areas of high unemployment, and thousands of people were put on the phone lines with insufficient training, made to work under sub-par conditions for six months, before getting promptly sacked for arbitrary reasons just before their probation period was over.

These are just businesses abusing the system. Not accepting the job offers would have meant financial ruin. The people who are subjected to this usually have no other options available, and they're then run into the ground and promptly discarded once they were no longer useful.