What worries me is that, in 2007, the Iraq war was apperently the only thing worth investing in 0_o.
Oh, and. Didn't I read somewhere that Iraq and Afghani war spendings were... classified or something?
Wrong. That chart is of the budgetary deficit. In 2007, the chart (claims) says that the lowest deficit since 2002 was primarily composed of Iraq war spending. Without the war, the deficit would have been much smaller but the overall government debt would still have increased.
Now then, the real issue is that Obama has greatly increased the overall national debt (as well as the budgetary deficit). If, within the next decade or two, politicians continue to spend more money than the USA makes, the interest payment on the debt will exceed government revenue and thus the debt will accumulate faster. In fact, at that point, there may be three options. The first is to print enough money to repay the debt, causing a period of severe inflation which may be difficult to stop or at least slow. The second is to declare war on major lenders and basically destroy them or at least their ability to be repaid. The third is to overthrow the Federal Government and replace it with either one or multiple new governments.
Of all options, causing massive inflation would be the safest but also will rebury the USA. Timing would be everything. A major war might be a good second choice but will have a large risk and possibly long-standing international consequences. The third choice may be the most dangerous as a war against the federal government would be tough--they control various espionage agencies and the military, so getting the wheels turning on revolution would be difficult unless these parts of the government defect. If they don't defect, the revolt is basically crushed. It also has the possibility to turn from revolution to civil war and end with multiple wars. It also would leave us the most vulnerable to large wars--we might not have to declare war on an enemy as they'll declare a war on us. That said, we have relative security thanks to our geographic location, but any half-industrial or half-developed country could invade. The prevalence of nuclear weapons is also scary as there are too many scenarios to account for.
