I was thinking this cos so far earth has spent countless millions funding the expedition, countless people have died, they awoke the wraith and now the asurans and what profit have they made???? A handfull of puddle-jumpers and a city they can't run due to the enormous power requirments
Why keep going??
The SGC had to keep going cos the goauld were right there on the doorstep but they can just close the door on the wraith.......why bother????