Money is not Math. Math is not Money.
Here is a secret:
Q. When does 4 + 4 = 0?
A. When you are counting oranges.
Let’s pretend you have 4 oranges on your kitchen table and you go to the store and buy 4 more oranges. How many oranges will you now have on the table? If you said “8 oranges” you would be correct, because you used a mathematical calculation to solve this arithmetic problem.
But what if you left the oranges on the kitchen table, and never ate them for thirty years, how many oranges would you have left? Of course, the correct answer would be none. Why would that be?
Mathematically you should still have eight oranges, but in reality there are none. Perhaps you got hungry and ate one of them (propensity to consume), perhaps one of the neighbor's kids was hungry and came over and took one of them (taxes), perhaps some micro organism ate it from inside out (inflation).
Money is a commodity and like the oranges has several eroding factors working against it. Once understood these eroding factors can be minimized and the transfers of wealth they produce can be stopped and those “lost” dollars can be recaptured for you and your family to enjoy.