For my own part, I'm content to wirehead to the extent that I have confidence that machines are capable of being more productive-to-others than I am along the axes I value being productive-to-others on.
Put differently: I don't seem to care very much whether I am doing important things, as long as important things are getting done at least as effectively as they would be were I doing them.
There's a slight refinement to this in the case where the entities doing the important things are basically like me, since there's a whole question of whether I'm defecting in a Prisoner's Dilemma, but I interpret the connotations of "machine" as implying that this complication doesn't arise here.
Ah, a very interesting point of view. Framing it as a dichotomy between important work and wireheading seems a bit stark though. Are you meaning to include any sort non-productive fun under the umbrella of wireheading? I usually think of that term as implying only simple, non-complex fun (e.g. pleasure of orgasm vs experience of love and friendship).
Kevin Drum has an article in Mother Jones about AI and Moore's Law:
Although he only mentions consumer goods, Drum presumably means that scarcity will end for services and consumer goods. If scarcity only ended for consumer goods, people would still have to work (most jobs are currently in the services economy).
Drum explains that our linear-thinking brains don't intuitively grasp exponential systems like Moore's law.
He also includes this nice animated .gif which illustrates the principle very clearly.
Drum continues by talking about possible economic ramifications.
Drum says the share of (US) national income going to workers was stable until about a decade ago. I think the graph he links to shows the worker's share has been declining since approximately the late 1960s/early 1970s. This is about the time US immigration levels started increasing (which raises returns to capital and lowers native worker wages).
The rest of Drum's piece isn't terribly interesting, but it is good to see mainstream pundits talking about these topics.