Paul Clifford used the disingenuous statement "tax loopholes" to describe legitimate tax deductions and credits.  These were not loopholes, they were part of the tax policy initiated by previous governments with full knowledge of how they would be used.
The rest of his letter clearly shows his radical leftist credentials.  He should remember the old saying that when governments are powerful enough to give you everything you want, they are also powerful enough to take it away.