The country benefits, because the country can collect more taxes during the period of inflation, and generally speaking, the country is a debtor, and a large number of bonds are in the hands of residents. Inflation can reduce the pressure on the country to repay debts.
Monopoly enterprises are the beneficiaries. Because of the nature of monopoly enterprises, enterprises can set higher prices during the period of inflation, which can not only make up for the losses caused by inflation, but also make enterprises get more profits.