But you're taking it as a given that my tax dollars going to subsidize such "art" IS actually going to meaningfully enrich other people's lives. I don't accept that assumption. The only given in such government funding is that it meaningfully enriches (in a monetary sense) the artists who are being subsidized.
As an artist, I'll chime in here. Subsidizing art doesn't, in any way, enrich the masses. It enhances the "art as commodity" effect, rather than diminishing it. It creates a huge community whose purpose is to garner government funding rather than to truly express themselves artistically. It ultimately hurts true art -- art that is made as a personal expression of creativity.
This was obvious in the US a short time ago. "Artists" spent more time and effort on their grant proposals than on their "art". During the heyday of the National Endowment for the Arts, from the mid '80s to the early '90s; entire groups sprung up whose sole purpose was to collect government funding. A few never turned out a single product, and of course were never penalize for it, because hey, that's just how "art" works. Galleries sprung up all over, and were flooded with the most pitiful collection of crap turned out by any hack with a fresh BfA and the ability to write a convincing grant proposal.
There was soon a huge competition for gallery space and promotion; and the focus soon became one of popularity rather than artistic skill. Art became increasingly commoditized, and great sums were paid for works that are now nearly worthless; the artists almost forgotten. Grants became more commonly given to more popular artists. It quickly became apparent that what it took to survive was not to be a better artist, but to be a better advertiser. And artists quickly learned that Controversy sold better than Art. The great wave of "controversial" artists then took over. It was no longer about the art, but about outrage and spectacle. Hacks who could create a good show, regardless of the quality of their art, got the public recognition, and therefore the government funding. Lacking the capability to create art that was valued for it's own merits, they began to trumpet the need to value art because of it's message or origins. It wasn't enough that people appreciate their art, they had to "understand" it, to "realize it's cultural significance". What mattered was not the art itself, but who created it. Art created by yet another surburban kid from a big New York art school didn't matter; but the same art created by disadvantaged black lesbians did. The most important part of any gallery exhibition wasn't the work being exhibited, it was the "vision statement" that preceeded it. Art and artists became more and more elitist and detached; and began creating and living in specialized groups and communities that bore less and less resemblance to the rest of the world. The market was flooded, and people began to lose interest.
Thus we ended up with people like Robert Maplethorpe, technically mediocre, unoriginal and derivative; but who managed to create enough of a furor for his
presentation of his subject matter (he was not even original in his choice of subject, far from it) that he managed to create a moderately lucrative short-term career before fading back into obscurity. Or Andres Serranos, a completely talentless hack whose stated purpose was not to create art, but to create outrage, to simply piss people off. People who would never have even been a blip on the radar of the public had it not been for the NEA funding controversy; which truly talented artists remained relatively unknown to the public at large. They tried to hide behind a flag of repression, accusations of censorship, even though those weren't even remotely applicable to the situation.
For a while, everyone knew who Maplethorpe and Serranos were, but only in the context of the controversy. How many people outside the art community/industry knew what sort of work they did before the blow-up? How many know what they've been doing since? How many had even heard of truly talented artists working in similar media from the same period, like Erwitt, Ulesman, or Witkin. How many people recall the true censorship controversies involving true artists, like Mann or Sturges?
There was the inevitable backlash, or rather two backlashes. Rather than enriching, people began to see art and artists as nonsensical garbage, ivory-tower mental masturbation, offensive trash, and poorly-disguised pornography. One, smaller segment, moved even farther into elitism, denouncing all contemporary art in favor of the classics; but in an exclusionary way, pronouncing art to be above the masses, and denigrated anyone who liked fine art "for the wrong reasons". The mass movement swung away from the self-proclaimed elites on both ends, and ended up moving into the commercialized kitsch that now dominates popular culture.
So rather than "empowering" artists and "enriching" the masses, government subsidies contributed, rather, to it's decline as fewer people were making art for the sheer creative urge, and more as a propaganda and money-making tool.