"Using energy as the measurement of an economy's size would naturally lead to economies across the globe investing in raw energy output, rather than other equal

"Using energy as the measurement of an economy's size would naturally lead to economies across the globe investing in raw energy output, rather than other equally (or more) important areas of technological progress like making future infrastructure more energy-efficient." The first part is probably true, but surely if your currency is based on energy, you will probably spend a hell of a lot of effort on squeezing the most out of each dollar/joule?