Answer: increasing the sales tax
Step-by-step explanation:
Government revenue are the income that are made by a government from either taxes or other means such as fees, fines etc. The revenue made by government is used for building infrastructures, settling debts etc.
The method of increasing government revenue has an immediate effect is the increase in sales tax. A sales tax is an indirect tax which is imposed on people when they buy goods.
When sales tax is increased, it has a immediate effect as government revenue rises when goods are bought.