The principle seems to apply to agriculture, and by implication, the apostle Paul also applies it to stewardship. Don't cut back on your crop or your seeds because you will reap what you sow. What you invest, you will also harvest. You get what you pay for. Some foolish greenhouse farmers think that if they spend too much on the seed or on the crop, they'll go broke.
Actual experience says it is just the opposite.
Some Christians think that if they give too much money to the Lord, they'll go broke. Or they think their money flies away and disappears. But the Bible says it is just the opposite. Your spending on the Lord is an investment in eternity, and it pays back big time. So I thought about economics.