Title 31 Section 5112 (h) and (k) authorize the Secretary of the Treasury to generate new money:
(h) The coins issued under this title shall be legal tender as provided in section 5103 of this title.
(k) The Secretary may mint and issue platinum bullion coins and proof platinum coins in accordance with such specifications, designs, varieties, quantities, denominations, and inscriptions as the Secretary, in the Secretary’s discretion, may prescribe from time to time.
And Title 31 Section 5103 specifies that the Fed must credit it:
United States coins and currency (including Federal reserve notes and circulating notes of Federal reserve banks and national banks) are legal tender for all debts, public charges, taxes, and dues.
The distribution of coins differs from that of currency in some respects. First, when the Fed receives currency from the Treasury, it pays only for the cost of printing the notes. However, coins are a direct obligation of the Treasury, so the Reserve Banks pay the Treasury the face value of the coins.
So, the Treasury needs to mint some trillion-dollar coins and deposit them into its account at the Fed. The face value of those coins will get credited to that account as revenue, just like taxes. Then, by definition, there will be a budget surplus. And, the Treasury can then pay budgeted expenses from that surplus, with no need for further borrowing.
Yes, too much spending in excess of tax revenue can eventually cause inflation, but not until the slack is out of the economy. The eventual contingent possibility of inflation is much better than the near-term certainty of the total worldwide economic collapse of which we are now being warned.