Ah, my mistake. My brain stopped processing after reading that line.

>the people who weren’t invited were hired at a later time when invites were sent out.

Going off of this line alone, you were hired after the bride sent out her invites. Which meant that the budget for the amount of people to invite to the wedding had been finalized, and possibly the seating arrangements if food was involved.

It would be too stressful to have to go back and find more money to budget for extra people that got hired on at work to enable them to come to the wedding. Not only would the bride need to spend more money on extra invites, they would need to spend extra money on food, seating, and all the little things that add up with inviting more people.