From Henry George:
> Now, to produce wealth, two things are required: labor and land. Therefore, the effect of labor-saving improvements will be to extend the demand for land. So the primary effect of labor-saving improvements is to increase the power of labor. But the secondary effect is to extend the margin of production. And the end result is to increase rent.
> This shows that effects attributed to population are really due to technological progress. It also explains the otherwise perplexing fact that laborsaving machinery fails to benefit workers