Originally Posted by
Mamee & Co
It is not a shady move if it is explicitly stated, which yours appears to be. The business reason for it is to aid comparison amongst salaries in an organisation easily, where there may be a choice of kiwisaver, pension plan and other benefits. You have a total package and you can choose how you split it. If Kiwisaver is included for example your base salary will be 100/102 of your total rem.
The thing is that it wasn't explicitly stated by anyone. I only discovered it by carefully reading my employment contract before signing.