There is an opinion that the more money you spend, the more you get in return, it is interesting to find out who really works in this direction. I spend enough money, but I have a fixed income, therefore I will not be able to get more. I don't have rich relatives, and I don't expect an inheritance either. I want to get rich, not to deny myself, but I have to save on everything. Who really faced big expenses and received even more? How does it work, maybe I don't understand the essence of it correctly?
I don't think this makes any sense on a personal level. Why should increasing our consumption lead to a higher income? It only leads to having less money in our pockets. This statement is true on a company level that invests in their own business. You need capital to buy new machines, run advertising, create new products, etc. If you are a successful business it means that spending more money today will lead to higher revenues in the future. But for us consumers it doesn't help if we spend all our savings on a new car, long vacation and the newest iPhone and iPad. These are all purchases that don't lead to higher income for us.
I guess that's one way to look at it and if I'm not mistaken, maybe the OP also mean the same thing too but in a different manner like spending on ourselves because we are our own investments, so the more money you spend to yourself as an investment then it's likely to happen you will get more in return somewhere in the future, depends on the ROI.
If this is not what the OP meant then I don't know anymore because it just doesn't really make sense if you just spend on anything and still have more in return. The world doesn't work like that.