Why doesn’t Mister Big Liberal Springsteen show up there, anyhow?
Ahhhh!!! Because mr big liberal Springsteen is a filthy capitalist pig.
One of his concert contracts was posted on the Net a few years back. He's more demanding and pampered than our 'queen', the Bigfoot Wookie.
Brucie gets a Private Jet to fly him and his mrs to any concert, On the House, and once there, basically won't unlock his guitar case for another $100,000(1) -- but at least he's 'famous'.
(1) I think he even gets paid extra to go to the bathroom