<span style="color:rgb(0, 0, 0); font-family:arial,helvetica,sans-serif; font-size:16px">They have been called everything from locusts to barbarians – but one </span><a href="http://www.ft.com/topics/themes/Private_equity">private equity</a><span style="color:rgb(0, 0, 0); font-family:arial,helvetica,sans-serif; font-size:16px"> fund says it has evidence it is capable of doing social good as well as making money...</span>