That said:
Or are you implying that money I make from work falls into one category, whilst any money I made from investment of that money falls into another.
Sorta. Consider this: I enjoy the car game Blackjack (21, for those of you ont her other side of the pond). I've played in in Europe, where the house rules are substantially different. One of those differences is the concept of the "side bet". In Europe (Austria, anyway), onlookers are allowed (even encouraged) to place "side bets" on one's hand. The side bettors have no say (unless, of course, the player allows them to) in how the hand is played. They (the side bettors) simply go where the hand is hot, place their money down, and reap their rewards (or suffer their losses). Nobody makes them place a side bet (the players, of course, must make a bet, or they lose their position at the table); they can come and go as they please, and if they don't like hou you play your hands, they vote with their feet. Now, the money they make doing this spends just like any other money they make doing any other endeavor, but is it the same as the money they make actually sitting at the table? I don't think so.
Do you see the analog?