your own link seems to split the blame
between the baker's union and the hedge funds.
Since distressed value funds, vulture funds, look for companies they think cheaper than the value, they normaly pay fractions of what the company should be worth to gain control. It's also quite common after this happens for companies to be sold off in pieces, both product rights and physical assests
I haven't seen the numbers yet on what the concession to benefits and pensions were and what the cost of both unions and management salaries and benefits are.