The Chinese and the Pakistanis have problems

Not only did they advise to cut entitlements in the States (wasn't it the People's Republic of China?) but they're spying on our radar eluding helicopters, as in the one crashed during the Seal's Bin Laden mission. This also thanks to Pakistan. There's talk in Congress of cutting off all aid to Pakistan, (finally a good idea!) while others claim that it's a mistake because it's an unstable country with nuclear capabilities. So how does our aid or lack of it impede them going nuclear?