They've put all their eggs in the store-branded goods basket. Their ads are all centred around $6 t-shirts and $4 coffee mugs etc.
I went into a K-Mart to get a few pairs of Explorer socks and all they had was their own brand equivalent which were of very dubious quality. Walked back out and bought them from Target. People buy products like that for a reason. I don't want 5 pairs of socks for $10, I want one pair of socks that will do the job.
Don't think Wesfarmers will be too bothered which one you buy from.