Well 10 guys going for supper is microeconomic.... not macroenomic..... Anyone who applies a microeconomic analogy to macroeconomic issues should read up on the difference between the two.
Ill give you an example of how microeconomics fails on the macro level. (Say) I have a family of 10. We are running low on money. It would make all the sense in the world that cutting back on expenses and "tightening the belt" would leave that family in a better financial condition. Now that concepts fails on the macro level because you are dealing with a family that doubles in size regularly. No amount of tightning the belt is going to help no matter how much you tighten it. Only investments in development will cut it now. You need to invest to have the capacity to deal with future numbers.
EDIT: I often see these type of fake analogies that used to make sense to me. As they say, bull**** baffles brains and if you dont have a good understanding of the issues, these microeconomic analogy arguments make a lot of sense. Thank goodness people pushing me to learn economics means I now understand where the BS comes in

Still got a ton to learn but Im slowly getting there.