That's a nice story. That's a shame real wages fell in the aftermath of Black Death 
https://mpra.ub.uni-muenchen.de/15748/
https://mpra.ub.uni-muenchen.de/15748/
Read your own source:
Quote
Not until the later 1370s almost thirty years after the Black Death did real wages finally recover and then rapidly surpass the peak achieved in the late 1330s.
What do you expect short-term for an economy devastated by 40+% population kill off.
Once the crisis passed and the economy got back rolling again, it was the great reduction in the labor supply that allowed wages to rise as they hadn't before when laborers were substitute goods in an oversupply because grains farming other than rice is not as labor intensive.
And that spurned the demand for innovations which could once again reduce labor intensity.
Please do not continue your nonsense. You can protest all you want about me suggesting to you to stop splattering your Dunning-Kruger arrogance all over this thread.
Are you French? (see http://france-bitcoin.net/ in your signature line that makes me think maybe you are). If so, perhaps that might explain your arrogant attitude. I've heard but never experienced personally that the French are quite arrogant.