Salary Offer Dilemma: How Should a Company Handle Overpromising Pay?

I would like to discuss a case that happened with a company. A candidate was offered an amount of salary, but after reconsideration, it was found that the salary offered is high. The candidate has accepted the offer and also resigned from the previous company. What are the different options for a company?

In my opinion, the employer cannot roll back the offer. When an offer by one party is accepted by the other, it becomes a promise. The employer has to consider the follow-up actions taken by the employee and the negative impact the proposed rollback of the offer would cause on his career.

If the already offered salary is much higher than the industry norms and was made in haste, the alternative is to freeze it for some time or add some feasible additional responsibilities to his job profile with the consent of the prospective employee.