The introduction of the tax was to tackle tax and National Insurance avoidance schemes through the use of intermediaries, such as Partnerships or Personal Services Companies (PSC). Contractors often use a Limited Company as a PSC to obtain work either direct from an end client or via an agency. HMRC’s view was that a large number of IT Consultants, Engineers, non-executive directors and “one man band companies” were often treated as self-employed when in fact they should have been treated as employees of the end Client.