When Democrats are wrong about economics, they are guilty of producing inefficiency. Whereas if Republicans are wrong, they tend to damage and kill the vulnerable.
As a result of events like those in 2008, we know that Republican models don't reflect what happens in the economy. They predicted inflation as a direct result of quantitative easing. It didn't happen. Are Republicans surprised that Dems think they are either grossly ignorant, or simply evil, when they pursue the same policies?