Dasgupta, as someone with a record of concern for development and the well-being of the global poor, is someone who should be taken seriously when voices them and might be expected to devise and support policies that benefit the worst off. Right-wing hacks, are, needless to say, a different matter.Arnold Kling blogs at Econlog; calling him a "hack" is wrong and insulting. What is it with left-wingers assuming that libertarians don't care about the poor? Kling describes himself as a bleeding heart libertarian and Bertram would know that. Jane Galt decided not to let him get away with it. Chris responds in the comments where he and Jane have a fun exchange. Chris ends up calling Jane a hack as well! Classic.
Much of the debate has focuses on whether Kling is correct in his initial post. While that is interesting it isn't relevant to question of whether or not he is a hack; he could be wrong without being a hack. Bertram needs to show that Kling was being dishonest or deliberately distorting someone else's position. Same thing goes for Larry Summers; he repeatedly said that he could be wrong but that based his belief on the evidence he had read.