I was just talking to my son about that this morning. My view was that investors do it to MAKE money, make a profit from where they invest. So its more like a short term gain, the “investment” but later, a monetary drain when the profits roll in.
However, if a foreign business man invests in a manufacturing business or factory in the USA, to produce goods sold overseas, THAT would be a positive cash flow situation for the USA as a whole.