>Having enough money to eat, pay the bills, buy materials, and live life, isn't subjective.
These things are in fact highly subjective.
Not to the individual artist. They have an objective amount to cover their expenses and make profit. To say it's "subjective" is scam talk, language used to try to sucker someone into accepting a lower standard of living so they can work for less on your special snowflake project. The writer needs the artist more than the artist needs the writer. The artist sets the terms. Period. Don't like it, find another one. (almost all can't)