It is an “open secret” that HMRC staff members who work from home take excessive breaks and instead of working, partake in gardening, take the dog for a walk and play PlayStation, a whistleblower has claimed. The department’s culture has been branded a “shambles”, caused by chaotic management and a wave of unskilled recruits, according to another whistleblower. Some customers who attempted to speak to a HMRC employee over the phone claimed they were interrupted by the sound of a baby crying and told by an employee: “I’m upstairs but I will pass you down to my wife who is in the dining room and…