NATO funding is in the realm of a few million per year for administrative costs, and all members make these payments. Perhaps you are referring to the requirem

NATO funding is in the realm of a few million per year for administrative costs, and all members make these payments. Perhaps you are referring to the requirement for NATO members to spend minimum 2% GDP on their own Military? In which case other responses explain that, on average, this is already occuring. Further to that, percentage of GDP is a problematic metric to measure spending, as a member could in fact increase their military spending year on year, but if their spending increase doesn't keep up with their GDP increases then it can appear that they are spending less.