More than a dozen WGBH honchos at PBS’ taxpayer-subsidized flagship station are raking in upwards of $200,000 a year while toiling in the lap of a luxurious $85 million multimedia palace dubbed the “Taj Mahal” that boasts a 200-seat amphitheater, state-of-the-art recording studio and Hamburg-Steinway grand piano. The Herald’s review of the nonprofit producer behind such PBS stalwarts as “Frontline” and “Nova” comes on the heels of yesterday’s sudden ouster of National Public Radio’s boss following a viral video that showed another NPR executive calling Tea Party Republicans racist. The furor is fueling a new push to end taxpayer subsidies...