Im sure most governments will already hire hackers.. In one way or another, I mean, If a person is good enough to be hired by them and protect from hackers, then they must also know ho to hack in order to stop them!
I saw another thing on the news about the US Government, They've set up a load of computers in a closed private network, to simulate the internet, and they're going to use it to run tests on possible situations that could happen.