In the US? Not much. If they gave it directly to USA citizens it would amount to about $8500 per person. If they gave it to the government to pay down it's debt, they'd reduce it by about 10%.

Everyone wants the rich to pay for free stuff for everyone, but they actually do not have sufficient wealth to do it. This is why when the government starts giving away "free" stuff it inevitable falls upon the middle class to pay for it.