I think he means resources as in compute cycles and the like. Those tend to increase exponentially for the same number of dollars in a Moore's law type way to intelligence should increase in an approximately linear way, something similar to a few IQ points per year.

You can see a similar effect in computer chess ELO scores over time, with the odd blip up see https://www.reddit.com/r/dataisbeautiful/comments/1iovlb0/oc... (1985 - 2023) and https://wiki.aiimpacts.org/speed_of_ai_transition/range_of_h... (1960 - 2000)