Again, read the studies on the cost of overdose prevention vs. the cost of post-overdose care. Also read the studies on healthcare costs saved by the reduction in the transmission of bloodborne illnesses such as hepatitis and HIV facilitated by the provision of clean needles & other supplies. 

These programs save money as well as lives. You may not be happy with where your tax dollars are going, but until legalization is a realistic alternative, every dollar spent on providing clean supplies & safe consumption sites saves several dollars that would otherwise be spent on long-term care and overdose response.

(And yes, I also wish users who drop needles in public places would stop doing so.)