I sell my time, by the hour or by the deliverable. I expect to be paid once (and only once) for work I perform. Sometimes I give away my labor for causes I consider worthy. In general, unless I've got a contract that specifies how I'm paid I don't on spec. I don't feel any entitlement to compensation for work performed outside such an agreement.
All work I produce for profit is expressly for-hire and "owned" by the paying Customer. I've got no rights in the products of my work. I've never produced work that my Customers have subsequently licensed or sold, nor would I take on such work. There's plenty of work to do w/o going down that distasteful road.
Any software, writing, photography, music, and other creative endeavors that I've pursued in my personal time and that I have distributed have been permissively licensed or disclaimed to be in the public domain. Fundamentally, I believe an idea can't be "owned". Anything I communicate to others is no longer "mine". It belongs to humanity. Attribution of authorship has a moral component to me (i.e. plagiarism is morally wrong), but making derivative works or exact copies of the works of others isn't wrong. All human expression is derivative.
The current copyright regime in the United States is such a perversion of the original intent that I consider it immoral to participate in it for profit and I have varying degrees of contempt for those people or companies who do. The social contract is skewed too far from the benefit of the public, in favor of the entrenched copyright interests (who, by and large, aren't creators). If the copyright regime were returned to the original term and renewal I might change my opinion, though I still wouldn't participate personally. That would, at least, bring works into the public domain in a sensible time period.
By and large the "entertainment industry" is the object of my ire, because their lobby has been the one seeking to increase copyright terms and to make draconian laws, like the DMCA, to limit individual rights. I think the "tech industry", as we know it, would function in substantially the same manner w/ shorter copyright terms (and w/o software or business process patents-- though that's not really what we're talking about here).
Have I benefited from the current copyright regime? Sure. A lot of the work that I do involves support of non-Free software. Like I said-- if we went back to sensible copyright terms I think the tech industry would be mostly the same.
Perhaps I'm a hypocrite who can't ever be redeemed for working in the tech industry. I was born into the "IP" regime that exists today (at least, prior to the Sonny Bono copyright extension act and the DMCA), but I'm trying to navigate it with the moral compass that I've got.