Why should PhDs get a social stipend, but not a chef? This would ultimately be a net transfer of wealth from the chefs to the PhDs, by force of law.
Disasters are going to happen. Having an unskilled population could mean the end of humanity.
A tiny increase in allowance for learning and maintaining(!) useful skills could be an interesting approach. Cooks seem pretty nice to have. In a worse case scenario they could be even more valuable if they could cook on open fire, do a bit of gardening, know more about nutrition.
It will be somewhat of a hard puzzle slapping value on training that is theoretically useful, we might have to do crude generalizations like phd = 200$ extra per month but it wouldn't be perfect or even elegant.