As opposed to putting your retirement fund into other company's stocks, which everyone does at the same time, making those companies too big too fail without unraveling several threads of social fabric.
I think your statement actually proves why employees should have stock in the company.
If we really were worried about issues such as this we'd have universal (not attached to you employer) healthcare and a pretty robust (but minimal) retire fund for citizens.
But we have the opposite of that with none of the upsides.
