This doesn't contradict me. GDP is just the total size of the economy, or specifically all the transactions in the economy. I didn't say that government spending doesn't exist, I said it doesn't create jobs. Or more precisely it doesn't create net jobs. The economy grows by adding value. The G comes from another bucket, no value is created and no jobs are created. Value is destroyed. That doesn't mean all value in the economy is destroyed, that means the government portion of the spending reduced wealth because it spent without creating value and therefore didn't create jobs.Economic growth is the aggregate of what all the participants in the economy create.
Aggregate Spending is Y = C+I+G+X-M
Perhaps you don't know what the G stands for in that formula. Why don't you look it up, and then we can talk about how the Government takes away from the economy.