“Time is a great deal more than money.”
Bennett treats time as the more fundamental resource because money can be gained or lost within time, whereas each passing hour is the fixed medium in which every other activity occurs.
Source details
How to Live on 24 Hours a Day, opening discussion of the daily allotment of time. The represented public-domain Project Gutenberg text is #2274; the line is conduct-of-life rhetoric, not a literal economic equivalence.