If you work with undesirable technology then it's entirely possible to double it. As an example, a friend of mine is a Sitecore developer. Sitecore is an enter

If you work with undesirable technology then it's entirely possible to double it. As an example, a friend of mine is a Sitecore developer. Sitecore is an enterprise-level CMS on the .NET framework that is used by large companies, and it's feature set boasts some impressive marketing tools. He recently went into contracting after around a decade of experience, and he's pulling in £400 a day in Bristol and Nottingham. This, for him, was a "really low rate" because he was starting out, and for his next contract he'll probably bump it up to £600 a day or more for London. The top Sitecore architects that contract will earn anything from £800-1200 a day, which is insanity to someone earning a fairly standard developer salary. Then again, I'd argue that dev salaries in the UK are low in general, and contractors only illustrate the huge difference.