This is happening in almost all states of India. Examples are Patnaiks in Odisha, Kanunanidhi family in Tamil Nadu, Deve Gowda's family in Karnataka, Reddys in Andhra, Tackerays and Pawars in Maharashtra, Scindias in Madhya Pradesh, Sorens in Jarkhand, Badals in Punjab, Devi Lals family in Haryana, Mulayam family as well as Charan Singh family in Uttar Pradesh, Laloo Yadav family in Bihar, Abdullahs in J&K etc etc. but people seem to point fingers only to Gandhi family of Congress.
If they take interest in the welfare of the people, there is no problem at all.
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Given chance, itz like that every where. Bush, Bhutto, Gadafi, Saddm, Kennedy, Clinton, .........
No problem if the continue in politics for generation, but what one has to worry is quality of politician for which we hv to blame ourself in electing them.