I like Vinod Khosla's take (on Twitter): Stop measuring GDP and instead measure the total income of the bottom 50% of the population and optimize policy for that. Additions and exits from this group can also be tracked. We get what we measure. Will this raise income inequality?
That would make a great sci-fi story: somebody wakes up with amnesia within a John Rawls thought experiment. I'm not smart enough to write it, but I'm giving the idea away for free.