[imtringued]

It is kind of interesting how this was the core observation of Keynes. It isn't capital that dominates the markets it is money.

According to classical economics people either spend or save, there can be no such thing as indecisiveness or paralysis. What this means is that a too low interest rate would immediately cause inflation and therefore result in a higher nominal interest rate because the rate of capital formation is too slow.

In practice we haven't observed any capital shortages that weren't the result of a one off event. The interest rate appears to be the only barrier and the return on capital followed it in countries excluding the USA.