Yes, such salary raise is applicable for NAB employees. Salary raise for BPS employees is generally raised twice in a year.

1) Salary raise (10% to 20%) is generally announced in the budget around June every year. But it is not mandatory for a government to raise salaries every year, but generally they do so for inflation reasons.

A. Such % raise is applicable on your Running Basic Salary (RBS) and as a result it revises your Basic Salary as well. The same % raise also proportionately increases other non-frozen basic salary dependent allowances as well.

OR B. At other times, government may choose to pay the % salary raise on RBS as an Adhoc Relief Allowance (ARA). This is generally not welcomed by employees as it does neither revises RBS nor such % raise changes your other allowances proportionately.

2) Other salary raise is called 'Annual Increment' that is applicable at year end i.e 31st December. For example: for a BPS an Annual Increment for such a BPS Scale (10000-800-34000) would be Rs. 800. This again would revise your RBS and other non-frozen basic salary dependent allowances.

A few latest updates regarding Salary
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-- Yesterday, a reliable source at DD level confirmed that although TCS Rules 2002 mentions an 80% NAB Allowance, however couple of years back when scales were revised (2011 probably as that's when the scales were revised), NAB allowance was revised to 15% of RBS and the field allowance(not admissible during training) at the rate of 50% RBS.

--Moreover, he told me house ceiling is admissible upto 15K in federal territory, and for all other areas in Pakistan it's admissible upto 12K. And he suggested that he doesn't see any reason why NAB should not make it admissible for the trainees at the same rates.