e.g. see for instance this discussion http://www.economist.com/blogs/freeexchange/2013/02/labour-m...
Further I can't really stand the crocodile tears of business who want to employ workers at below living level wages. Their fake concern for worker is nauseating.
If workers are having to top up wages with food stamps and government aid then the business, management, and shareholders rather than the worker are effectively being subsidised by the taxpayer.
And if you let companies lower wages to compete then the bad employers drive out the good. Far better to make them compete on the product or service not how badly they are willing to treat people.