So, maybe? McDonald's will likely have better compensation.
https://www.afm.org/2021/09/san-antonio-symphony-musicians-d...
Who says they aren't? The people I've known working in the arts very often have multiple jobs, even if one of them is notionally “full time”, usually at least one of the jobs is a personal business. Performers very often are tutors/teachers of the same kind of performance.
I mean there's a lot of unemployed musicians in San Antonio now....
They can drop the baggage (the board of directors), hire a marketing consultant and some ancillary staff, and maybe do other things with the arts in the area.
The AFM won't let them. Members aren't allowed to take gigs which pay less than union-defined minimum rates. In many cases they're not even allowed to donate their services to non-profits; the closest they're allowed to do is to get paid, remit union dues, and donate cash to the non-profit.
Definitely the scenario you mention is impossible in Europe.
As the article points out, Lubbock, a much smaller city, doesn't seem to have a problem with paying their unionized musicians or staying solvent.