[quote=@Silvan Haven]
<Snipped quote by Oblivion666>

Its been stated that the Wizard Saint position is as much a political position as much as it is an acknowledgement of a wizard's power. There are plenty of people who are strong enough for the spot but the ten Wizard Saints are the ones that the Magic Council hold up as examples to the rest of the world.
[/quote]

Yup

I remember that in the manga, it was mentioned that some people from the Council thought about endorsing the title of Wizard Saint for defeating Jura. But because they remembered that Laxus can be boorish, their decided to not grant the wizard Saint to Laxus. A wizard's behavior would also explain why especially since Natsu didn't get a mention of deserving the rank after defeating Jellal.