The South Korean military admitted, when pressed by parliament, that they monitor many North Korean military activities in real time, using a combination of technology and agents. The growing corruption in the north has been a major assist to South Korean military intelligence. The reliability of the spies can be checked via air reconnaissance, spy satellites and other sensors, making the South Koreans confident they know what's going on up north. The South Koreans are less and less impressed with North Korean military power, which is slowly eroding because of money shortages and declining morale and discipline.