You'd guess wrong -- there is an over supply of art teachers, and under supply of math teachers. If you are in math, you can get a job teaching. If you are in art, you probably can't get a job teaching [art].

This is probably a strong indication we have an oversupply of artists!

I was talking about absolute numbers (sorry for not making that clearer), so your assessment is correct without contradicting mine. The oversupply of arts teachers probably consists of ambitious people who hope copyright will make them rich. Abolish copyright and the teacher/student ratio will likely drop to the math level.

Most likely because the barriers to entry is lower than in mathematics. Everyone and his brother think they are "artists".