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.
In addition to having no obligation to intervene to protect the public, government law-enforcement agencies are protected by many layers of formal immunity which allow them to both abuse their power and neglect their duties without any significant repercussions to themselves or to budgets.