Its not so much that i have a problem with Amazon. But PayPal has become the norm now for secure payments. I don't see why we should have to hand over my Credit card details to yet another database.
Retailers in Australia accept either Visa OR MasterCard, following this, i don't see why a website would not offer both Amazon AND PayPal as payment options.
I have used PayPal for years now and never had an issue.
Regards