What does the relationship between kafka and his father have in common with the relationship between gregor and his father?

While gregor's father has certainly seemed to exploit him, using his son to pay off his own debts while he lounges around the house eating leisurely breakfasts and taking naps, there is also some evidence that he was once in nearly as pitiable a situation as gregor. we learn in chapter 2 that gregor's father had not worked for the past five years, and that these years "were the first vacation of his hard-working

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Aslender threadlike object or fiber, especially one found in animal or plant structures.