jones US government finances not being sustainable long term is something you'll need to substantiate.
US debt has grown more in the last 10 years than it did in the previous 200+ years. Deficit has averaged 3.8% of GDP over the past 50 years, it is currently at 6.2% and projected to come down to 5.2% by 2027 and then rise back up to by 2035. I ain't no financial expert like you but that doesn't sound very good to me.
jones What would be unsustainable long term is if governments followed your advice
My advice would be for them to cut down on wasteful spending and fraud, I think they'll be fine if they do that.