The first person responding perhaps thought it was easy money. Every subsequent answer is a race to the bottom. So why not go all the way and allow responders

The first person responding perhaps thought it was easy money. Every subsequent answer is a race to the bottom. So why not go all the way and allow responders to underbid the last guy? That way, someone could spend an hour writing a very detailed response hoping to get the $7 and someone could come along, crib their answer off of the first one, and offer to accept only $6. The first guy, not wanting to totally waste the effort he put in, can then lower his bid to $5. Rinse and repeat.