"These aren't going to extend our capabilities and allow us to do things that we are turning down,"
Isn't there a likelihood of being put under more pressure to do a particular tasking if you've got NVG's - "We've forked out 90 grand to fit these things and you're saying 'no it's too dark' ?!?!?"
Whereas without them it's somewhat easier to decline - "if I can't see the aircraft, I ain't going up in it!"