No. I'm saying neither corporations nor unions should be allowed to make campaign donations. I thought that was clear, sorry.
Also, integrity is only of interest to (the majority of) investors / shareholders when there's a possibility of hurting their benefits. Layoffs, salary freezes, exportation or outsourcing of production and waste disposal are all decisions that are taken with the bottom line as the primary if not only concern. Maybe evil is not the word, and yes there are certainly some more and some less ethical models, but there is no question "corporate interest" tends to be a rather one-dimensional concern.