The Colombian government also works with the United States government to control trafficking via aerial and water routes. The Colombian National Plan also attacks the demand side of the drug problem. The government encourages an alternative development program for small-scale farmers in areas where there is a high incidence of illegal crops. The government gives subsidies for crop transport and storage so that the farmers must not rely on the illegal crops. With all of Colombia's tactics to remove the drug problem, it still exists.
Corruption is the key to the problem.
Because drug trafficking is so lucrative, politicians, police, and other government officials are bribed to look away. As a result, the United States has canceled visas of government officials and decertified the country as a drug partner. The drug policy in Japan is very influenced by the United States. After the war, the policy changed to mirror the United States policy, and in some cases, it is even more punitive than the United States system. With the United States and Japan engaging in an economic conflict including trade disputes, Japan increased the punitiveness for drug crimes, especially for the use of stimulants, to appease the United States government.