It works more or less like that in Italy (probably related to some european regulation): every electric-powered device sold to consumers includes a tax to (help) pay for its disposal.

The same law that introduced the tax also says that the stores who sell such  a device have to take back another one of the same category, and dispose of it properly. This probably works better for big stuff like refrigerators than it does for small consumer electronics, but at least is a start.