depositors of any national bank shall be held primarily and exclusively
for the benefit of the depositors in the savings department; and in
case of a bank failure, if the investments made for the benefit of
the depositors in the savings department do not satisfy their claims
in full, then the depositors of the savings bank shall be entitled
to such a part of the capital, surplus, and capital liability as the
savings deposits bear to all other deposits up to and until the savings
accounts are paid in full.