So...let me recap for a second...see if I understand.
GM went into bankruptcy partly because of the crushing legacy costs; retirement, healthcare, etc. I think the price was something like 10 employees' benefits for every 1 actively working employee? I've got the exact number wrong...but it was very high.
GM was in the process of paying their share to the VEBA fund which would take the burden of retirement and benefits off of the company when they went into bankruptcy. (read: "the fund was going to get this payment anyways...")
And so the union invested in GM to help them through the bankruptcy...they're making money off of it and putting it into the VEBA fund....
Which will release GM of the aforementioned responsibilities (and costs).
And this is a bad thing because one publication wrote an opinion piece on the subject?