I'm a parcel courier and I know first hand that not many postal companies will accept or burden their staff to handle 20kg or over and the few specialist heavy

I'm a parcel courier and I know first hand that not many postal companies will accept or burden their staff to handle 20kg or over and the few specialist heavy package postal companies that exist both struggle and churn through employees by the day. The reason is quite clear all postal companies are using zero-hour staff on minimum pay, and if you're a job seeker you will be better off being an office cleaner for the same rate of pay than to be ordered to deliver 20kg+ packages for 11hours a day with no time off, work health care plan, and the employers right to replace you at will. It's simple economics of health and well being.