The fastest-growing age subgroup in the united states today is

age group 85 and older, good luck

Budget surplus

Explanation:

In simple words, When income surpasses expenses, a budget surplus is created. Consumers have "savings" instead of a "budget surplus," hence the word is frequently applied to a government's financial situation. A budget surplus indicates that the government's resources are well-managed.

A budget surplus helps to stabilize the economy when it is expanding and undergoing inflation. In this case, tax rates rise in proportion to rising employment as well as income