Creating new money to finance a budget deficit is likely to be the most inflationary because it increases the money supply in the economy without a corresponding increase in goods and services. This excess money can lead to increased demand, driving prices up as more currency chases the same amount of products. Such a scenario is depicted in the Quantity Theory of Money, which posits that inflation results when there is an imbalance between money supply and economic output. Hence, this practice is considered highly inflationary and can destabilize an economy if used excessively.