Does the deposit by the treasury official of government funds in a usurious bank—due to the absence of any other means—count as participation in usury?

If the bank is governmental, there is no harm in depositing money in it with interest, because all the money belongs to the government, so usury does not apply to it. However, if the bank is private, it is not permissible to deposit money in it with usurious interest, because it involves assisting in sin.