Sorry workers don't owe anything to Lowe's for "giving them a job". Lowe's pays a wage to the employee for work as a mutual agreement between company and employee. So any employee has the right to voice their opinion on a company they work for... especially if the company changes policy that negatively affects said employee.
I am to think Lowes came searching for you to work for them, I think not. Did you state this exception on your employment application that you would not work for a company who changes policy that negatively effects you, I think not. Policy or anything, for that matter, is not written in stone, as economic changes require modifications to stay solvent. I have many friends who are without a job and would take yours or my job in a heartbeat and not complain. Sometimes I think we take many things for granted until you wake up one day and they are gone. I was in the military for eight years and they taught me a word called LOYALTY. I see that you don't think you owe the company anything. That statement alone says volumes about you.