Could be interesting to try negative tax on works from small artists up to a certain value. So when you buy a painting from some person of little name recognition the goverment pays like 20 percent extra up to 2,000 Euro, 10 percent up to 5,000 Euro, and over 10,000 Euro taxes are paid as normal for luxury goods.
Of course you'd need a bunch of bureaucracy to avoid it getting abused, but it would help artists make a living.
Seems like it could be an "infinite money glitch" if the artist and customer are in cahoots. Churn out alot of cheap artworks, even just fake ones, then split the profits. The bureaucracy capable of preventing this would be so onerous, would anyone still be interested in the dole for it?
Of course you'd need a bunch of bureaucracy to avoid it getting abused, but it would help artists make a living.