I've posted previously on Perez's biography with nary a response. Perez supported Clinton and worked for Obama--that's all that matters. He's a sellout, a shill for the 1% (isn't everybody at this point?), and corrupt because, well, something about the DNC, corporations, and the "establishment" (keyword we toss around). That he was a great labor secretary, finalizing new regulations that took years to create and rebuilt the justice department's civil rights division and prosecuted multiple employers for violating worker's rights doesn't matter.
As progressives, our job is to define what "progressive" means at all turns, depending on the hot topic of the moment, and more importantly, ensure all are excluded who lean our direction generally but who don't fit our shifting definition.