Allow me to help. ALL of your money goes straight to fund the 2.6 Trillion gubmint budget.
The money is NOT used to buy TReasuries. They are special IOUs which are NOT marketable. For example, you could make yourself an IOU that says you are a worth a million, but the 'note' would be worthless, except by your income power.
In 2018 the government will lost this source of 300 - 400 billion in funds. Then real treasuries will have to issued or drastic cuts made. Interest rates will go up.