This is wrong. Trading is positive sum. When companies trade with employees to buy labor or trade with consumers to sell goods, all parties are better off from the interaction — otherwise they would not trade.
It's certainly plausible that the value of many jobs is negative, and even if you give away your entire salary, it could come out negative for society.
This whole idea is also out of touch with reality and lacking in common sense, because people who aren't interested in finance aren't likely to be competitive in it.