The constitution requires government to provide for the common defense. Tanks and bombs. It does not require them to have the most expensive and powerful military in the history of the world and bases all over the world.
Do you remember why our navy was created? It was created to protect our trade in the eastern Atlantic Ocean and the Mediterranean Sea. Why did our trade in those bodies of water need protection? Because of the Barbary Pirates, the Islamist terrorists of that time, would attack our ships and sell the crews into slavery or pay a tribute (a tax) to the governments of the pirates. Thomas Jefferson believe that rather than pay the tribute he created our navy to stop the pirates. Our trade is now world wide to protect our trade, and the trade of almost every other country in the world, does indeed require the most expensive and most powerful military in the world. While you might not like it that the US does that but would want some other country to have that power? If you do, who should replace the US? Russia? China? How about Saudi Arabia? Iran? Think of the consequences if any of those countries, or any other, replaces the US as the most powerful military in the world. When the US replaced Great Britain the GDP of GB declined by about 25%. Would you like that to happen to our economy?
The Constitution also requires that it "promote the general welfare".
Greger, our government is supposed to promote the general Welfare in the way it's author James Madison said. Here is what Madison said about it.
"If Congress can employ money indefinitely to the general welfare, and are the sole and supreme judges of the general welfare, they may take the care of religion into their own hands; they may appoint teachers in every State, county and parish and pay them out of their public treasury; they may take into their own hands the education of children, establishing in like manner schools throughout the Union; they may assume the provision of the poor; they may undertake the regulation of all roads other than post-roads; in short, every thing, from the highest object of state legislation down to the most minute object of police, would be thrown under the power of Congress... Were the power of Congress to be established in the latitude contended for, it would subvert the very foundations, and transmute the very nature of the limited Government established by the people of America."
The general Welfare clause does not give our government carte blanche spending power.