How does the wage growth is calculated? I work remotely so I have to be employed as a contractor. I doubt I'm included. Significant portion of my colleagues are

How does the wage growth is calculated? I work remotely so I have to be employed as a contractor. I doubt I'm included. Significant portion of my colleagues are "permtractors" with companies registered in Channel Islands and other places. Another example is a friend that is paid only half legally. I don't think the situation is as bad as press is describing.