At the risk of being (rather) trite, I would suggest that old saw, "Follow the money." Someone was incentivised (for lack of a real word) to make this happen.

At the risk of being (rather) trite, I would suggest that old saw, "Follow the money." Someone was incentivised (for lack of a real word) to make this happen. I would look toward short term incentives and/or compensation. Without getting into issues of culpability or "guilt", at a very basic level I can't help viewing the repeating series of these instances as simply being another form of "pump and dump". They keep happening, because someone (or, a certain kind/role of someone) is making money.