In a situation like this an insurer is strongly motivated to prove that the company is not at fault, because it doesn't want to pay the bond. The company is also strongly motivated, even though insured, to prove that the company is not at fault, because it doesn't want to have its future insurance rates affected or be sued by the insurer for breaches of terms.

Either way, it doesn't help the people affected. Not unless they have personal insurance against workplace computer system errors, in which case their insurance provider is also not motivated to pay out, or to battle a corporation as large as Fujitsu unless there's chance of a class-action suit.