I remember going to DC policy seminars on the topic that groups like the ACLU and the Cato Institute held 10-15 years ago, and Cato published a lengthy paper about these abuses in 2006: http://www.cato.org/sites/cato.org/files/pubs/pdf/balko_whit...
There's even an organization devoted to ending civil asset forfeiture abuses: http://fear.org/
But after roughly three decades of this practice, and over two decades of well-documented abuses, nothing has changed. Why this remains the case, even though every politician and judge is aware or should be aware of these abuses, is left as an exercise for the reader.