St George call centre seems to be doing everything they can to reject high income customers. They are clueless morons.
I had a similar experience earlier this year with multiple emails with multiple proof of income documents sent.
Took about 2 months and almost gave up. In the end I had to go into a branch.
I am a medical specialist with a high credit score and could not believe the hoops I had to jump through. I have never had the slightest issue getting any other credit card before.
My wife applied but was rejected (she has a high income from a discretionary trust distribution, and does not work). they were absolutely not interested in giving her a card.
Earlier in the year, she applied for an Amex Explorer and it arrived in the mail 2 days later.
Put $30,000 on it in the first month. Not smart St George!