“As long as the reason is not illegal (e.g. firing because of the employee's race, religion or sexuality.)” While the odds of someone sueing a company for that

“As long as the reason is not illegal (e.g. firing because of the employee's race, religion or sexuality.)” While the odds of someone sueing a company for that are very high, the costs are also extremely high. Companies do extensive performance evaluations, performance improvement plans etc, to minimize the potential for wrongful dismissal lawsuits.