I really appreciate your use of the word "inept".
Lakoff's Rockridge Institute, one of the few liberal think tanks in this country, closed it's doors on April 30 because of lack of funding. Conservatives have lots of think tanks, and they keep pouring money into them. That's a big part of why they're winning arguments that they should be losing just based on outcomes, never mind the moral issues.
Liberals aren't getting their act together because, as Lakoff says, they're stuck on the "rational actor" model, which obviously doesn't work. There may be more that distinguishes progressives from liberals than just economic policies.