Cost and backlog. Take DNA, we aren't even able to work through the existing backlog of DNA collected specifically surrounding allegations of crimes. For many

Cost and backlog. Take DNA, we aren't even able to work through the existing backlog of DNA collected specifically surrounding allegations of crimes. For many crimes that aren't at the level of seriousness of murder we don't even collect DNA from a crime scene. >Money laundering is illegal, and requiring online banking credentials be handed over would deter money launderers. We do far more than that to stop money laundering and not merely at the border. To say nothing of the many other types of searches we already perform at the border.