That’s a fair point, and I agree with both of your solutions: We should promote the availability of works from past eras, and encourage more new art from underrepresented cultures and groups. But I don’t think there’s any need to discourage or reduce the creation of new art overall. There seems to be a concern that truly beautiful works of art will get buried under a flood of disposable pop culture trash and forever lost in the glut. I’ll admit there might be some truth to that, but for the most part, I think it’s a greatly overblown fear. Shining jewels are bright enough to stand out on their own merits.
Also, I don’t really want a world where all art is high art. There are times when I’m in the mood for low art, sometimes I just want to sit back and enjoy some shallow comedy or mindless action movie. I enjoy a good steak, but that doesn’t mean I never want to eat hamburgers or cold cuts again.
Most libertarians I know believe that a more ‘right-wing’ economic system will help the poor, along with everyone else. Libertarians generally don’t tend to worry about “freeloaders” the way conservatives do, which is why they mostly focus on government regulations and corporate welfare, while conservatives mostly focus on social welfare. When libertarians do take a stand against social welfare, it tends to be less about freeloading and more about welfare programs creating perverse incentives (e.g. discouraging people who want to work but would lose their benefits and be worse off if they did). Just look at the difference between libertarian and conservative arguments against the minimum wage. Conservatives will go on about how uneducated burger flippers don’t deserve $15, while libertarians will focus a lot more on the fact that increasing the minimum wage will just make it harder for people to find work and make poor people worse overall.
Libertarians largely fall on the ‘thrive’ side of the thrive/survive spectrum. They might be closer to the middle than the far-left redistributionists, but so are moderate center-left liberals. The only difference is, unlike the center-left crowd, they see government intervention as the main obstacle preventing people from thriving.