In most aspects of our lives, we select things that have become successful through competition in the marketplace. We rely on this mechanism to bring us everything from good food to high quality and safe cars. In other words, we trust the market in many, many ways.
This brings us to a fair rationale for school vouchers. When it comes to education, there is much less competition. There is only one public school system in a given place and students are generally assigned to a school. If we were to adopt a voucher system, the argument goes, we would force public schools to compete with private schools and perhaps with one another. This would, advocates say, improve the performance of public schools.