Is it just me or are you all going bonkers?
This is a line of credit -not an investment account. It is like saying "if I repay my loan in full and then keep paying more can I get a term deposit or investment account rate?"
If you look at nab, cba, westpac, bankwest our any lender - their loans and debt based products have never been used for holding surplus cash after the loan's paid out
If you have other debt - offset your cash against that. If you have no other debt and are holding cash you need to put it in an investment account -not a line of credit.
Or you can argue that if you pay off your 5k credit card then put an extra 50k in, the return is crap compared to a ubank saver... Go figure.....