Here's and interesting comparison of figures from the Office for National Statistics, plotting immigration against unemployment. Positive correlation, do me a favour!
Perhaps let's plot unemployment against the financial actions of the banks and the repercussions on our workforce. Or perhaps the nice 'outsourcing' by some other thrifty capitalist, to another country in the name of market forces. The capitalist model dictates employment, the same model that compels migrant workers to come here and the very same that results in them leaving when the jobs are not present.