Why Will Successive Governments Not Address The Issues?

'At least a third of migrant workers in England and Wales are not included in annual net migration figures, a report has showed.

Migrants who stay for less than a year are not counted in official estimates, but were ‘a significant part of the migrant workforce’ between mid-2004 and mid-2009.
The report, by the Office for National Statistics (ONS), found 97,000 short-term migrant workers came to England and Wales in the year to mid-2009, but were not included in the official 168,000 figure for those staying more than a year.'

BTW, the answer to the question in the title is: 'Because the EU won't let us and as we are so sold out to Brussels, we do not want the plebs knowing that fact!'
Read more: http://www.dailymail.co.uk/news/article-2007616/Migration-count-does-include-ONE-THIRD-foreign-workers.html#ixzz1QBe4xfoa