Resource scarcity generally creates economic depressions, not growth. In general, something like a food shortage will cause people to freak out and try to horde whatever is left which causes commerce to start siezing up. This is why whenever it starts to happen the government comes in and injects a bunch of cash into the economy.
I have no idea what you mean by "The only demographic that provides results for their work".
Even from the perspective of creating competition for desirable outcomes, you want your workforce healthy and educated to be at their most productive. People are obviously going to be more productive when they're able to take care of themselves; they don't just stop caring about their lives once they have their most basic needs met, and even if your needs are being met, you have to continue to work to have your needs met.
I have no idea what you mean by "The only demographic that provides results for their work".
Even from the perspective of creating competition for desirable outcomes, you want your workforce healthy and educated to be at their most productive. People are obviously going to be more productive when they're able to take care of themselves; they don't just stop caring about their lives once they have their most basic needs met, and even if your needs are being met, you have to continue to work to have your needs met.