> whats the goal of government education subsidies
a more educated populace is a public and civic good on its own terms. Public funding for education is maybe partially for economic returns, but is mostly because education is a necessary part of a functioning democracy and a necessary part of living a good fulfilling life
So have community things where people give free lectures at the local library or whatever.
Shifting the goalposts. For most of american history a high school education was considered sufficient to be part of a functioning democracy. If a music education (or whatever) is required to be part of democracy, then everyone should have it.