The production of wealth requires the consumption of wealth. If 100 men tasked with building a mansion have enough wealth in terms of food, materials,shelter,energy,etc. to sustain their consumption/use as they produce the mansion, wonderful! If on the other hand they have an increased amount of 0s at the end of pieces of paper (more money), they will NOT have the necessary real wealth to consume as they produce. Therefore, as Ludwig von Mises so beautifully summarizes:

“Credit expansion[more money] cannot increase the supply of real goods…As a result, the upswing lacks a solid base. It is not real prosperity. It is illusory prosperity. It did not develop from an increase in economic wealth. Rather, it arose because the credit expansion created the illusion of such an increase. Sooner or later it must become apparent that this economic situation is built on sand.” — Mises p. 162 (words between [brackets] added by present author)