The British complained of unfair competition from goods supplied by the American colonists. So the state intervened to manage trade and make it "fair." But the American revolutionaries saw protectionism for the scam it was, and still is.
Government policy encourages homeless people to congregate in public areas twice over: first, cities destroy access to very-low-cost housing. Second, city governments often refuse to enforce their own rules of public-space use. Tent cities result.