Resources are most definitely not infinite, there is simply a different amount of accessible materials in Earth's core. Gold and silver would be a lot better for many technical applications but we're not using them because they are a lot more scarce than aluminium (or copper). The same goes for our CPU-s, if we had infinite resources we wouldn't bother with Silicon, we would have transferred to 250GHz Gallium-Arsenide chips 20 years ago.

Energy is not infinite either (note the difference from renewable !) and, worse yet, it has a non-uniform geographical distribution and is unwieldy to transfer over large distances (except for, ironically, fossil fuels). Also, you need energy and resources to be able to produce more energy and resources - which is a vicious cycle in itself.

The third, maybe most important factor is the human resource scarcity. There is a finite number of people who are able to do certain things. There is no infinite supply of doctors, scientists, engineers, etc, and those just cannot be replaced by machines as of yet.

And what most these utopian setups conveniently forego is the *dynamic* nature of resource usage, i.e. how natural or social events change both the resource type and amount of it that is required.

Without intending to downplay any donations, which are more than welcome, up until now, those served more as a token sign of support, not as something that was able to keep projects/people going.