Staying apolitical, any time the police find several thousand dollars in cash during a traffic stop, there's a good chance that money is connected to illegal purposes.
The supreme court just ruled that the searches that generally turn this money up are illegal.
The police can ONLY search your car if they have probable cause that there is a crime being committed, or if there is evidence that would require a search of the vehicle in question that would support the crime you were pulled over for (speeding, seatbelt violation etc). They cannot just search your car because you're pulled over for speeding anymore. They could still get a warrant to search if they wanted to, but they actually require a warrant issued from a judge. They can't just search the car because they feel like it.
And I honestly don't care if people are carrying around large sums of money. Since when is that illegal? I don't care if it came from drugs. Prove a crime has been committed, and I have no problem with it. The problem is that cops (Dallas county is real bad at this) just pull people over, say they will let you go if they can keep the car/cash and then do just that.
Are the people generally "baddies"? Maybe. It doesn't invalidate their right to due process, though, and it puts the Police department in the position of judge, jury and 'executioner' if you will. Not to mention the potential for abuse (ala WDM's police chief).
This sort of thing is disgusting, IMO, and the 'police officers' in question should be in prison.
