This presupposes that lending is the preferred form of investment. While that is often true, purchasing rather than loaning is more normal. Institutions prefer the safety of loaning. Individuals prefer the growth of equity.
J
Depends on how high the rates are. In Brazil during the late 90's the real interest rate was consistently above 20% per year. Very few investments have that sort of returns, specially when interest rates are so high. So why risk lower returns or even losses on equity when you can lend to the government at 20%+? You can double your capital in under 4 years.