Let me give you an example that proves you wrong (and it's because money is "fungible.")
Day 1, you borrow $10,000, and you spend it. You pay no tax on this money - because it is a loan.
Day 2, you repay the loan with $10,000 you had in a savings account, plus $0.01 interest.
Your "tax situation" is EXACTLY the same if you take the loan and spend it, repaying with other money you had, or if you DON'T TAKE THE LOAN, and use the $10,000 in savings for your purchase. Your "tax consequences" do NOT CHANGE because you take the loan, and the TOTAL TAX you pay is exactly the same either way.