I don't know that much about Jung, but it seems to me that the basic idea behind handing the consequences of their actions back to our addicts is very similar. Rescuing them certainly doesn't help anything.
I do understand and agree with the disease model of addiction, but it certainly does involve individual choice. It isn't like the addict is helpless to change. Mostly they just don't want to.
Same goes for codependents. Change is uncomfortable. I don't think anyone changes until they step up and accept total responsiblity for their choices and the consequences of those choices.
But I don't think that harsh love should be used as a weapon against an addict in an effort to force them to change. That goes against the principles of our recovery, and would keep us bound up in trying to control them instead of learning to focus on ourselves and our own junk.
JMHO