No, I don't think they should. My feeling is that most parents do EVERYTHING they can to help their children succeed, therefore, if an adult child has the means to help their parents a bit later in life, they should just help. I'm not talking loans, I'm talking about GIVING. I'm also not talking about fully supporting them, unless there's some sort of medical/extenuating circumstance. For example, if my mother said she had to pay an unexpected bill, but was going to be short on either food or heat, I'd give her what she needed to get by, with no precepts about repaying me. Believe it or not, most parents won't even accept it. I've had parents-in-law rip up checks and refuse to cash them.