Defence is only 12% of the US federal budget - what are you going to cut it to? It's not going to solve the issue even if it's abolished. Over the last 10 years health, Medicare and Social Security have grown 103%, 83% and 78% respectively for an increase of $1.64 trillion to $3.55t vs a $916b on defence. With an aging population it's only going to cost more and more over time, you can't continue to put higher taxes on a shrinking share of productive population to care for more and more unproductive retirees under any economic system.