How do we decide that one has "the requisite skills and relevant knowledge and experience", rather than "mandated credentials"? Should this only apply to charter schools? Since I've worked in a hospital for over a dozen years and have observed surgery and taken care of post-op patients, should I be allowed to practice as a surgeon without that pesky "mandated credential"? Do I really need that "CPA" credential to audit your books? I used to keep the books for a company I managed - isn't that good enough? What if I were really good at playing a flight simulator game on my Nintendo? Could I be a commercial pilot now? I argue really well - can I be a lawyer now? Who needs all those silly government regulations? I could increase profits for my employer by working for less than those who got those blasted licenses and still make a decent living.