This is a cut
Although the Government claims that the change from DLA to PIP will make the system ‘better’, it was clear from the outset that the primary driver was to save money. The change was first announced in the June 2010 Budget, with initial projected ‘savings’ amounting to 20% of the DLA budget at the time, totaling £1 billion per year by 2014-15. This was before the consultation on the need for changes was launched on 6 December 2010 by the then Minister for Disabled People Maria Miller. 

The politics of the issue
This change was legislated for via the Welfare Reform Act 2012. Although my party voted against this, the Tory-led Government were able to push it through with the support of Liberal Democrat MPs.