[klibertp]

> Mother nature does not want sidewalks to exist. A smooth, even surface is not something that exists naturally,

How is that different from roads?

> you can't depend on people to maintain the sidewalks in front of their property

"in front of their property" is one way of looking at this; "alongside a road" is another.

[CydeWeys]

Even more so, why do we expect the state to pay for roads, which are only for drivers, but not to pay for sidewalks, which are for everyone? Sidewalks are just roads for people who aren't driving cars at the moment.

Logically, if the state were going to cover the costs of one of them, it'd be sidewalks, since they can be used by all taxpayers. You could have road users pay tolls to pay for the roads, and people who don't drive could simply opt out.