Just remember where this $600 came from, the government just prints money out of thin air backed by nothing adding to our monstrous debt we can never repay. The house of cards will eventually fall so enjoy your $600 bucks while you can.
If it was your budget and funding, or your town, or county, or even you state doing the funding, sure that's how it works. But, it's the federal government doing it. An entity "with its own central bank and currency and that never use another country’s currency"

Macroeconomics, money and post-Brexit recovery, all in one Twitter thread
This Twitter thread, published this morning, took about four hours and 40 years of thinking to write... I keep hearing people complain that the ‘mainstream media’ does not understand economics and that we’re talked down to as if everything must be explained as if the economy is a household. In...
www.taxresearch.org.uk
The rules are different. As long as injecting all the money doesn't cause an over supply of money sloshing around, it'll be fine. If it does start to cause to much, they can tax some back at that point to reduce the money in circulation. There's a reason the debt hasn't tanked us yet, and a core one of them is that the cash flow of the federal government is nothing like any other example as long as this stays true, "with its own central bank and currency and that never use another country’s currency".