> Is there any actual evidence this is true? A memo, or even a documented conversation?

http://www.cnn.com/2016/03/23/politics/john-ehrlichman-richa...

> Tell me again how this supports the argument Western countries forced drug prohibition on China when the reality was exactly the opposite?

I made no such claim, nor do I consider it historically supported.

> "At midyear 2013, 90% of inmates had a current or prior violent or serious felony conviction, and 16% were registered sex offenders."

Now you are narrowing the discussion to prisoners. Yes, felons with a record of violence tend to be incarcerated at higher rates than those without. However, making someone an unemployable felon is a kind of low-budget open-air life-long prison, or better, torture, which destroys the productive capacity of the victim.