Isn't the addiction that you are addressing in this post usually referred to as "workaholism"? Why the new phrase "excessive striving"? Or do you think that is a separate category?
The advantage of "workaholism" over "alcoholism" or or other forms of addiction is that you actually garner accolades for your behavior, usually right up until the crash. Unfortunately, both being lauded or being scolded for one's behavior only tends to reinforce the addiction (or force it into hiding).
Any possibility of salvation appears to be predicated upon "crashing" in the case of addictive behaviors that are externally lauded or "hitting bottom" in the case of addictive behaviors that are externally scorned.
Workaholism is also adequate except that in my case I strive excessively in EVERYTHING I do - whether it be work, a new fitness regime, my relationships or even my efforts to improve my health. No realm of my life is safe from my compulsive perfectionism and desire for achievement! You're totally right that workaholism becomes self reinforcing because of the accolades that one achieves. I'm glad I finally realized this and am breaking the cycle. Thanks for your insightful comment!