I think they are not completely blameless. Companies deposited money in a riskier-bank because they got more favorable terms/perks/... compared to other options. Now they don't have to bear the results of that risk because the Govt has stepped in.

Similar to the current US discussion around Student Loan repayment. Bailing students out of loans disadvantages everyone else who did not take those loans, or who paid them off already, because they had the foresight to choose a less-risky option.