What will the person who receives the additional two percent of their income do with it? Burn it? Not likely. What they will do is spend it or "save" it.
Saving it typically means that somebody else gets cheaper use of the money than they otherwise would.
Both scenarios increase economic activity and will increase the taxable base.
The only reason that taxes don't depress the economy more than they do, is because the government spends the tax money. Government activity generates economic activity that is then taxed.
Now you can ask yourself the question, "What will happen when the government must increase taxes to satisfy our debts, without being able to generate economic activity with the money?"
The answer is that economic activity will surge in areas populated by debtors of the U.S., like China, and economic activity will stagnate in the U.S.
There is never long term economic benefit from unnecessary government spending nor is there long term economic benefit to deficits which increase the national debt.
Most government spending is simply waste. It is the nation's wealth squandered on liberal nonsense. The delayed payment through deficit spending will not permit that waste to go unrecognized forever. In fact, as the boomers retire, the waste of government spending during their lifetimes will become quite evident.