New Jersey judge rules her pension benefits can’t be cut

From John Bury’s pension blog:

Judge Linda Feinberg, sitting in Trenton, ruled the increased health benefits and pension contributions that Governor Chris Christie and Democratic legislative leaders put into effect on June 28, are unconstitutional as it applies to judges, in particular Judge Paul DePascale, because it amounts to a reduction in their salaries.  The ruling does not affect state and local public employees, including teachers, police and firefighters, who are now paying the increased costs.

As Mr. Bury notes, why can other employees have their benefits reduced, but not judges?