Adam and Sarah are married and have two children. They recently purchased private health cover. Sarah is a homemaker and Adam works in a telecommunication company. Adam receives annual remuneration of $98,000 and $12,286 per annum in allowable deductions. He has $100,000 worth of shares of a large company, producing a 3% annual dividend yield (fully franked). He is concerned about saving for retirement and has decided to salary sacrifice $10,000 annually to superannuation. 

Considering all the Medicare levies and offsets, answer the following questions.

Required: 

How much is the total tax payable before salary sacrifice arrangement? 

How much is the total tax payable after salary sacrifice arrangement? 

Is it worthwhile for Adam to salary sacrifice $10,000? Explain. 

Given the availability of the age pension, why does Adam need to save through his superannuation fund for retirement?