Explain to me what the government provides that is so essential that it couldn't be removed or privatized.
Roads, unless you want to chip for your own six lane interstate overpass.
Water and sewage, unless you want every providing company to have it's own set of pipes in your yard. That goes for gas heating as well.
Military protection, unless you want either A) to defend yourself and township from all comers a la Afghanistan, or B) entrust your defense to mercenaries, who by definition, are people who want money and are better armed than you.
Maintaining a space program, unless you want all your electronic communications to go by landlines, which you'll also have to pay for yourself.
Law enforcement, unless... well, see military protection. I'll remind you that in the Old West you Libertarians like to harp about, ranchers who made the mistake of paying "law enforcement for hire" people like the Regulators often found themselves victimized even more than by the thieves they hired them to ward off.
And for that matter, a justice system with any sense of personal rights or fairness, unless you want to entrust your freedom and property to a court system literally run by businesses.
Basically, any kind of large infrastructure type edifice where individual benefit and use cannot be tracked, or where the public benefit is too great to do without yet the local public cannot individually afford, or where privatized systems system would be more inefficient for physical reasons, or for things like application of force and justice where you want to specifically remove any consideration of profit.
You know, the stuff that you take for granted every day in your modern existence, and when thrown back in your face you go, "well yeah, I meant examples besides
all those."