What if ONE (One Punch Man creator) goes out of his way to...
make Saitama purposefully more powerful then Goku?
I mean, at his heart, he's still just a popular internet celebrity who makes a world-famous webcomic that happens to be adapted to manga and anime, so at the end of the day, he makes the rules, and I assume we go with the webcomic anyway due to that being his most recent version, him being just some guy means he has more time on his hands, and he seems just like the type of dude that would be interested in something like looking "who would win" scenarios.
With that said, ONE could see how it's going and be like "Oh, I have the opportunity to make Goku look like an ant in comparison", I don't know how, but he'd just have to come up with feats that far outweigh Goku's.
Currently, all we know is that Saitama is able to take world-ending attacks with absolutely no damage done to him, but we don't know how much it'll take to hurt him.
It just doesn't seem like Akira Toriyama would care, where I could see ONE caring slightly, but kinda making it an afterthought.
Re: What if ONE (One Punch Man creator) goes out of his way to...
One doesn't care either. Saitama was made specifically to mock shounen's obsession with "feats" and "power levels." One Punch Man may have some serious and subtle themes every now and then, but Saitama himself will never be taken seriously, which is the point of his character.