Those tax cuts will definitely help, especially those having difficulty. Our highest tax bracket in the Philippines is only up to 35%, so seeing yours at 45% is surprising. We do have a different setup where a flat amount is paid, and additional will be computed based on how much higher the salary exceeds a certain threshold.
Australia is an expensive country to live in and it's getting worse...it's also unlikely the tax cuts will go far to alleviate the financial difficulties people face although some will benefit hopefully.