Looking after labourers isn't just a human rights issue. It's also a quality control and cost-benefit issue.
Happy, healthy labourers will build superior things for you. Things that don't require as much maintenance. Things that further enhance your reputation around the world. In these chaotic times of ours, this is a simple truth that is often overlooked.
Spending time, energy and other resources, from a place of compassion, on helping labourers substantially improve their lot, is an easy win. It's money in the bank.