Are modern economists right that eliminating deficit spending will decrease GDP?

From a recent op-ed in Capitalism Magazine:

According to modern economists, an elimination of deficit spending will immediately cause a dollar for dollar decrease in GDP. For example, if the government stopped sending food stamp payments to poor people, then grocery stores would lose business, employees would be laid off, and the economy would contract. But this one dimensional view fails to appreciate that the purchasing power of the food stamps had to come from somewhere. The government can’t create something from nothing. Taxation transfers purchasing power from people living in the present to other people living in the present. In contrast, borrowing transfers purchasing power from people living in the future to people living in the present. The good news for politicians is that future people don’t vote in current elections (and current voters don’t seem to appreciate the cost to their future selves of current policy).