What is a term for a person who spends money wastefully?

The term "spendthrift" specifically refers to a person who spends money extravagantly or in a wasteful manner. It captures the essence of someone who does not manage their finances judiciously and tends to indulge in unnecessary expenditures.

The other choices represent contrasting ideas. "Frugal" describes someone who is careful with their money and avoids unnecessary spending, while "thrifty" similarly refers to a person who saves money and resources. An "economist" is a professional who studies economic trends and the management of resources but does not imply any particular behavior regarding spending. Therefore, "spendthrift" stands out as the word that accurately describes someone who squanders money.