I think bad investments are not just stuff we do, countries could do that very well too. If you are a government and you are getting a ton of taxes there is two things you should use that for, one of them is to make your people happy and their life easier, the second one should be to find stuff that would make profit for the government as well.

I do not understand all of this "capitalist" BS that forbids governments to have companies, many governments actually do have business' but they do not look like business, like DMV type of places exists or postal office type of places exist, not just in one nation but in all nations and they do make a profit time to time, or at least they should.

So, at the end of the day governments should get our taxes, build jobs and business and after a while they will be making their own profits and taxes will not have to go up, or it could even go down.