If AI can truly replace human labor at a lower price point, then that's more or less the end for your median human. The economy will work by much the same principles as ever: those who can provide value will trade with others who can provide value. If that's not your median human, too bad for them. There may be some initial efforts by government to cushion people's irrelevance with UBI or other welfare schemes, but they won't be stable. Human rights and the political power of the median citizen are historically downstream of the value of the average citizen's labor.
If AI can truly replace human labor at a lower price point, then that's more or less the end for your median human. The economy will work by much the same principles as ever: those who can provide value will trade with others who can provide value. If that's not your median human, too bad for them. There may be some initial efforts by government to cushion people's irrelevance with UBI or other welfare schemes, but they won't be stable. Human rights and the political power of the median citizen are historically downstream of the value of the average citizen's labor.