Strict done!!

overlord/src/app/employee-benefits/employee-benefits.component.html

@@ -159,7 +159,7 @@
       mat-raised-button
       (click)="post()"
       *ngIf="voucher.id"
-      [disabled]="voucher.posted || auth.user.perms.indexOf('post-vouchers') === -1"
+      [disabled]="voucher.posted || auth.allowed('post-vouchers')"
     >
       {{ voucher.posted ? 'Posted' : 'Post' }}
     </button>