This will work. But let me explain why it won't work for more than 90% of the people who try (made up figure but whatever). You assume you can buy a voucher, put in a false billing address and start up an ad. But if the location of the voucher doesn't match your country (by your IP) then you'll get banned because they can't verify your billing address (they know you're using fake information).
Next, if you've ever had a suspended account, and try to make a new account with the same computer (okay, you can use the same computer), use a virtual machine, on the VM use a VPN before you connect to anything. You're going to want to use a fresh gmail account, you can view IP activity in your gmail account, you don't want to have any other IP's besides the one your using through your VPN. From now on associate that IP with that adwords/gmail account.
Next is the voucher problem, buying them off fiverr is a great way to get your account banned. (Some will fly, other's won't). But it's up to you, you can make your own vouchers for $1 using hostgator so you'll know they're for the U.S. Make sure your address matches your VPN's IP. Use a locator to see where it puts you, then use an actual address in that area.
Most of the accounts I make this way work fine, yeah, it's work. But I mean, you've either gotta spend money or time. In this case it's time. If you don't want to end up wasting time it helps to be very cautious and paranoid.