Here are a few things on my mind.
1) In tough times we have moments to show our true colors, to show grace and gratitude. These are moments to be our best. To all those who will be laid off, I hope you choose to be your best in this situation - there is nothing to gain from a different approach.
2) You don't control your own destiny if you are an "employee" (rather than an "owner"). There are benefits and risks to both options - We must accept what comes with the path we choose.
3) Target doesn't owe any of us anything. We should be grateful that a company will pay us a salary, for a value we give in return. If we determine our value is greater, we can leave at any time. If a company determines our value isn't needed, they can let us go. This isn't a lifelong agreement.
4) I have never met Brian, and likely never will. But, objectively speaking, he 100% believes he is doing the right thing to drive shareholder value. That's his job. And I am sure Gregg had the best intentions for driving shareholder value by entering Canada. Yes, Brian makes a lot of money, Gregg made a ton... but they didn't determine their value for leading the company. And a CEO will be eliminated when it is determined they aren't providing the necessary value.
5) Living beneath our means makes cushions times like these.
6) often the toughest times refine us, and grow us, the most. And a bad situation can turn into something really good.
I don't know your complete situation, but I just got laid off...so I know some of what you are going through. Hang in there to all that have lost, or will lose, their job.