"That would potentially have a negative impact on employment and business growth in our restaurants, as well as value for our customers," the company said in a statement.
The Wendy's Co. and Yum Brands Inc., which owns KFC, Pizza Hut and Taco Bell, did not respond to a request for comment.
The National Restaurant Association says the low wages reflect the fact that most fast-food workers tend to be younger and have little work experience. Scott DeFife, a spokesman for the group, says that doubling wages would hurt job creation, noting that fast-food chains are already facing higher costs for ingredients, as well as new regulations that will require them to pay more in health care costs.
Still, the actions are striking a chord in some corners.
Robert Reich, a worker advocate and former Labor Secretary in the Clinton administration, said that the struggles of living on low wages is hitting close to home for many because of the weak economic climate.
"More and more, people are aware of someone either in their wider circle of friends or extended family who has fallen on hard times," Reich said.
Mary Kay Henry, president of the Service Employees International Union, which is providing the fast-food strikes with financial support and training, said the actions in recent months show that fast-food workers can be mobilized, despite the industry's relatively higher turnover rates and younger age.
"The reality has totally blown through the obstacles," she said.