It could be argued, for example, that Eurobonds would allow eurozone members to pool their financial strength and, by enhancing the attractiveness of the euro as a reserve currency, hold down borrowing costs to such an extent that AAA-rated countries are not overburdened. Legal problems could also be overcome in the short term by designing Eurobonds to include credit guarantees, repayment priorities, and the use of specific tax streams as collateral.