If you think of them as a partner in supplying labor for a business to pursue profit, they have failed.
They have failed to deal with the 5% or 10% that are the problem children in their merry band of travelers.
So, the Million Dollar question is will they finally deal with these types that may need help, aka 12 step programs, a recovery facility etc. which would require them to change their business model to be a partner in business, not enabler of a host of bad behaviors within their "family".
Notice I am not holding my breath...
I think you put your finger on it. The union got these dope smoking drunks back on the job because every one of them was a brother, cousin, classmate, child, etc. of other union members. I suspect there is a very high degree of nepotism in the UAW.