To summarize the existing research of the soft budget constraint, we can find that most of them use the dis-cooperate game theory to analyze, and mostly concentrate on the government and enterprise.

已有的关于软预算约束的研究大多集中在政企之间，且多以非合作博弈方法对之进行分析。

youdao

Fiscal constraint includes government expenditure control, government revenue control and budget principle control etc.

财政约束主要表现在财政支出约束、财政收入约束和预算原则约束等几个方面。

youdao

We must tap the only entity that can spend without a budget constraint: the federal government.

FORBES: The Real Reason Unemployment Isn't Falling

The biggest drawback is that such a role for the government, combined with the lack of a budget constraint, gives them great power.

FORBES: Nobody Understands Debt--Including Paul Krugman

Under this hard budget constraint, the rest of the government would have to live on whatever revenues are left over after debt service and Social Security benefits are paid unless Congress is willing to vote for more new borrowing, by super-majority vote if it wants to increase the debt more than the economy is growing.

FORBES: In Passing The Most Recent Budget, Congress And The President Lied