Suppose we lived in a world without gravity. How would we feel about that? (For now, ignore the fact that without gravity our atmosphere and oceans would dissipate, suffocating all life on earth.)
How we feel depends on what we're talking about. No one could fall to their death and flying around would be really easy. Launches to space could happen almost accidentally. But at the same time liquids would get in all sorts of electronics and ruin them. Hydroelectric dams won't work. Plumbing, irrigation, and natural gas lines would fail. Assemblies lines would be chaos. Drinking would be hard.
Our civilization is built with gravity in mind. This counts not just preventing the bad stuff that comes with gravity (we have rails to prevent falls) but leveraging its reliable existence into something that benefits us. The constant gravitational pull lets us generate enormous quantities of power very cheaply. We'd be fools to ignore it.
Why then are we so reluctant to build our world assuming greed is as consistent as gravity? Why do we often assume that we live in a world without greed, where teachers, politicians, labor unions, and even companies will not act in their best interest? It is particularly tragic because we could rely on that consistent force of nature (and if you've ever seen a plant turn its leaves to light, you've seen greed as a force of nature) to transform that force into something productive.
Instead of relying on benevolent governments to determine the best way to reduce pollution, tax pollution and give people the incentive to find the best solution.
Instead of relying on good feelings to ensure we have good teachers, let there be a marketplace for education so the good teachers are rewarded and the bad ones are punished.
Instead of forcing experience and credentials to ensure everything from doctors to hairdressers make a quality product at a low price, remove barriers of entry and allow consumer sovereignty and competition to encourage a better world.
Instead of capping liability damages and relying on a regulatory agency to make sure firms don't skimp on safety, let's instead make sure that the firm will swallow the full cost of its carelessness.
If you think it's hard to change laws, you are absolutely right. But it's as impossible to repeal greed as it is to repeal gravity. Best to learn to live with it.