That is correct u do not need to bargain.
In fact if u don't want to accept their bargain u don't have to. In other words u could volunteer and then withdraw when they do not get enough volunteers to raise the ante to what u would consider reasonable. Of course after u withdraw the number may go up. ("such is life" Ned Kelly)
The reason they hand out the vouchers like candy is that only about 10-40% of vouchers are ever resubmitted. I confess some years ago it even happened to me.