Earlier quoted context omitted.
Countries are not companies. Also your comparison is pretty bad. The direct cost per unit is pretty high for a car in a car company, the one for a company in a country is negligible. So it's more like a publisher selling digital goods, except that there's no copyright, preventing the others from selling exactly the same for a lower price.
Countries provide a service (infrastructure, social programs, court system) based on a price (taxes). There is a floor for those costs. There is a minimal amount of tax required to provide those services. I think it's a bad idea to tell a country that they can't charge a lower price (taxes) in order to sell more business (have companies move there).
And you can go lower than that amount if you attract an abnormal amount of companies through an abnormally low tax.