Make's war more unappealing to those that are rational, which is the best you can hope for because there is no sure fire way of dealing with the irrational.
Although I think wars do often have an irrational element, economic considerations aren’t the only ones that should influence rational decision making.
War is pretty hard when a decent portion of the thing you need to actually do war are made by the country you're at war with. Sure, you can start a war, but it'll be over when your local warehouses run out two weeks later.
It could be, but are there many historical examples of wars ending for this kind of reason? Typically, no country has its economy set up for wartime production during peacetime. But that can change quickly when there’s a will.
Make's war more unappealing to those that are rational, which is the best you can hope for because there is no sure fire way of dealing with the irrational.