When government repay its debts,,,

Supposed situations

1. The government spends more this year than it collects in taxes, borrowing the difference.
2. The government will repay its debts.

In the future...?

When the government will repay its debts, the tax rate will be increased. Increasing tax will be a burden on people, which means people are willing to increase their saving by spending less. It is because the tax change causes the changes in the relative prices. i.e. the costs of goods, expressed in terms of other goods or in terms of a basic bundle of goods.