"economic surplus" is a correct and usable phrase in written English.
You could use it when referring to the amount of resources, goods, or services in excess of what is needed or required. For example, "The economic surplus produced by local businesses allowed for more generous budgets for the city."
Enlarging the workforce depressed wages, increasing the economic surplus available to the king.
For the Physiocrats, economic surplus was attributable to land, and population growth could therefore not increase wealth.
Also essential was an economic surplus, for slaves were often consumption goods who themselves had to be maintained rather than productive assets who generated income for their owner.
What mattered was controlling the world's primary currency, which would allow the United States to continue to recycle the global economic surplus.
Second, the technology of agriculture was no more advanced than that of war, so that, with most of their energy devoted to feeding themselves and with little economic surplus, people had few resources available for specialized military technology.
To maximise his share of the economic surplus, a merchant wants to sell to each customer at a price as close as possible to the most that client would be willing to pay.
The government captures huge economic surpluses from its citizens and returns little to them in the form of social expenditures.
The big contenders (financial and industrial capital) obtained a part in the distribution of the market and economic surpluses.
And the company's capital position looks adequate with more than £3bn economic capital surplus.
"It considerably strengthens Aviva's financial position, increases group liquidity and improves our economic capital surplus whilst also reducing its volatility".
Aviva has one of the strongest and most resilient balance sheets in the UK insurance sector with low sensitivity to market stress and over the last four years Aviva has tripled its economic capital surplus.
