You can only be a candidate for a given period of time. Your concern about multiplying the $5,000 amount every year for four years, which would allow people to accumulate much larger amounts, is already addressed, because this only applies to candidates, and only during the periods when they are actually candidates.
Votre crainte quand à la multiplication du montant de 5 000 $ chaque année pendant quatre ans, qui permettrait d'accumuler des montants beaucoup plus larges, disparaît parce que cela ne s'applique qu'à des candidats, seulement pendant les périodes de candidature.