The reasoning behind keynesian gold digging is that rich people will not accept that the government hands out money to poor people because that would threaten private businesses who are dependent on cheap labor. To make sure that the government money doesn't compete with private money you just force people to do worthless work so that working as a waiter for minimum wage is still more attractive than digging holes in summer heat. The entire point is that digging holes sucks. Meanwhile cryptocurrencies glorify digging holes.