Can you name some issues governments have solved with taxpayer funds?
Private industry has its place. Doesn't mean it's a good idea to outsource governance to them in all but name.
Water-spread diseases like cholera which used to kill thousands every few years in in places like New York or London in the 19th century are basically unknown today in the developed world, thanks to modern water treatment plants and sewers. While you might say there was some contribution to these efforts by private philanthropists, the vast majority of these public health efforts were government (taxpayer) funded.