Sure, that's why no consumers have ever benefited from any productivity gains ever... Central banks don't fix the price of apples. They simply make it possible

Sure, that's why no consumers have ever benefited from any productivity gains ever... Central banks don't fix the price of apples. They simply make it possible/easier for cultivators of apples to obtain capital to invest in more machines or developing new cultivars of apples. The alternative is that cultivators have to try to find the capital by borrowing more expensively from a fixed supply of stored wealth. From the point of view of people holding the stored wealth, the arms race for better products at lower prices becomes a zero sum game where it's a winning move not to just hold onto the cash and let other people take the risks. Unsurprisingly, this does not benefit consumers, or the productive.