Technically speaking, I fully agree with this meme. I also don’t want my tax money to go for manufactured wars, which presumably means wars in which the US is only involved because of domestic(1) financial and political reasons.
However, this assumes that the wars in which the US is involved are manufactured. That there wasn’t a reason to go into Afghanistan after 9/11, that there was no valid reason to invade Iraq, etc. This may be true, but it is not inarguably true. And if the underlying assumption falls, then maybe there is a valid reason to maintain the military, despite the cost.
(1) If “manufactured war” means a war that is initiated by humans, then by definition all wars are manufactured. Therefore, I do not think that is what the meme author meant.