Someone actually figured out that a service company competing with a shit ton of other service companies in a service economy needs people that work service jobs to be able to afford their services. They won't raise wages themselves alone because it's not like McDonald's workers will spend the raised wages solely at McDonald's. They have other essentials and non-Mcdonalds services to pay for. They need every place to have their minimum wage increased and then McDonald's try to capture a larger portion of everyone's higher income that exceeds their higher labor cost. Stagnant incomes means non-essential services like McDonald's get squeezed out