Your boss put it there so that when you complain about your job he can point to it and say ‘you think have things bad here but at least you don’t work across the street.’
Admittedly the source for this is Vice, but the explanation seems to be that this is an art piece by James Schieberl:
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"I always thought it was ridiculous that, out of however many first-world countries, that we were the only ones who don't have free healthcare," the 36-year-old explained. "So, yeah, this is kind of the idea behind that—just like, here's your free healthcare. It'll solve your problems." (The name of the piece, which was displayed at an art show around the 100-day marker of Trump's administration last year but conceived years before, is, in fact, Free Healthcare.)
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"I always thought it was ridiculous that, out of however many first-world countries, that we were the only ones who don't have free healthcare," the 36-year-old explained. "So, yeah, this is kind of the idea behind that—just like, here's your free healthcare. It'll solve your problems." (The name of the piece, which was displayed at an art show around the 100-day marker of Trump's administration last year but conceived years before, is, in fact, Free Healthcare.)