Just been gouged a whopping 43% increase in premiums for income protection by a 'big four' bank.

Along with a nice letter advising that I get a 3.5% increase in the value of the policy for CPI!
That is monthly cost from $410.00 up to $590.00. (for 11,900 p.m. cover)
Is this typical? Their excuse is that pilots are costing them more than they anticipated.
Would appreciate any suggestions of more reasonably priced alternatives.....