"useing the taxes it collects from its citizens for the common good."

Not just taxes, §14 of the german basic law for example says:

https://www.gesetze-im-internet.de/gg/art_14.html

Any property that is needed for the benefit of all (and where there is no alternative way to buy it normally etc) can be taken and redistributed.

So like a storehouse full of food, with a starving population and broken infrastructure - can be just taken and later compensated not with wartime prices, but "normal" ones. And I believe there are at least in theory some plans for that, which military trucks go to which warehouse and what are distribution centers etc.