There is a difference between a musician and an artist. Lots of people can play a musical instrument well, but very few of them are artists. Lots of people can make a living entertaining other people, but very few of them are artists. You may not understand or recognize the difference, but the difference exists. And there are people that can understand and recognize it. And it's not something one can easily fake, any more then one can fake being a doctor before a committee of doctors.
There is an endless need for artists in any society. And "demand" isn't especially relevant since artists work in advance of any known demand. They define "demand".
You should, however, be given the opportunity to develop it to the best result. Because the last thing we want to do is crush the next budding Shakespeare or Picasso before he writes a word or paints a stroke because we thought we needed him flipping burgers to serve the greed of some corporate conglomerate and a bunch of already overweight citizens.
I say greatness will reveal itself. A potential Mozart, Monet, or Shakespeare will not find themselves confined to a life flipping burgers. I see your portrayal as a gross exaggeration.
I surmise your artist welfare program would only prolong the delay of the mediocre from moving on to a more sustainable career path.