I don't think your shovelling snow argument necessarily equates to ownership.
Snow shoveling means ownership. You own the sidewalk and the easement requires you maintain clear and safe public access, therefore you are responsible for clearing and de-icing the sidewalk in front of your home within a certain number of hours after snow falls. If you don't, the city or county will issue you a fine and/or clear it themselves and send you a hefty bill. Similar regulations apply to uneven surfaces and landscaping on the far side.
The point with snow is that the concept of the sidewalk easement is well known to those in snowy areas due to the manual labor involved.
but here in Australia the fuel tax is much higher than in the US
In the US, federal, and often state, fuel taxes can only be used for transport projects. The money goes into the Federal Highway Trust Fund, "trust fund" being the key concept. In many other countries, particularly Europe, fuel taxes go into the general fund and can be spent anywhere. That's why your fuel taxes are so high.
Also, new roads are often funded by new construction. When somebody builds a house on unimproved land, they pay a "frontage fee" or a "development fee" to the city or county to compensate for the roads and utilities that are built. In other cases, a developer will build the roads in agreement with the city and then hand over ownership, of course recovering these costs in the price of the new real estate.
My overall point remains: sidewalks and roads are two cases of things your income taxes don't pay for and they show models in making public-use facilities without general taxation.
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