Newt and Perry are hammering him for making a fortune by buying failing companies then pulling some dirty tricks to make a tone of money, then bankrupting the company. This is, of course, the perfect example of how someone can chase profits in a way that isn't good for the country, but I'm shocked to see Newt and Perry strongly arguing that point.
read more here which talks about the documentary that Newt's super pac made and is running on south carolina.
To be fair he did phrase things incredibly poorly and open the door for this.