The Netherlands is actually renting out prisons to Norway (and others). Norwegian prisons are famously comfortable and aimed at rehabilitation (https://youtu.be/01mTKDaKa6Q?t=4m18s) but we still have draconian drug laws (thanks to the US) that keep filling up the few prisons we do have. Half of our prison population is in for drug-related crimes.
Luckily this is about to change, as our minister of health recently proposed to copy what Portugal has done – decriminalize all drug use and move all drug related problems to the health system, not the judicial system.
To bad for the Netherlands – they will probably loose a good customer.