spies can steal money / resource, but you wont get it. They destroy it, or keep it themselves not sure which.

Anyone cannot steal resources such as food, goods, metal, oil, rare materials, and golds but everyone can steal money.

The image capture says “ ( Someone ) stole $1,298 in taxes. ” in japanese.

I have gotten that before also, but my money value never goes up…. Or I cant add lol

The result is natural conclusion.
The “Disrupt Economy” will cost you $4,000, but you'll get less than $1,000 from a single spy at most.
So the balance is usually negative.

However, from a comprehensive view, this cannot be said.

Because, in extreme cases, if money: (target) resource = 1:30 in the "Stock Market", then $4,000 is invested, so even if can be destroyed only $4,000 ÷ 30 ≒ 133.333 ..., it's profitable.