welfare dependency

A child of the 1960s, this term shows peaks around 1973/4, 1988 and 1996.
This does look to correlatesome what with a Conservative government
approaching a General Election
http://books.google.com/ngrams/graph?content=welfare+dependency&year_start=1950&year_end=2008&corpus=15&smoothing=1&share=

benefit fraud

The term "benefit fraud" seems unknown before 1970. It does seem to go in
and out of fashion and there is no close connection with the UK party in power
http://books.google.com/ngrams/graph?content=benefit+fraud&year_start=1950&year_end=2008&corpus=15&smoothing=1&share=