Transitional = changing, developmental, fluid, intermediate, passing, provisional, temporary, transitionary, unsettled.
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Permanent = abiding, constant, durable, enduring, everlasting, fixed, immutable, imperishable, indestructible, invariable, lasting, long-lasting, perennial, perpetual, persistent, stable, steadfast, unchanging, unfading.
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How Transitional can change into Permanent and be called Fair is hard to understand.
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However if the company offered all staff the option to increase their Pensionable Pay by 18.75%, (ie, treat all staff the same) am sure most would see that as Fair.