Depends. Is this an entry level programmer? If so, is that entry level programmer fresh out of college and making $150k? Or is an executive making $500k? Is there an equity package? Or is this some guy making 55k and working 60 hour weeks? There is a continuum.
Also, 360 deals in music industry typically relate to the fact that all royalty and endorsement deals must go through the label - it used to be that artists could directly license their names for things like cereal endorsements or clothing lines. A 360 deal means that the artist must do that licensing through the label. Whether or not this is a good deal depends on the artist, the label, and the specific percentages involved.
That is not quite the same thing as a work for hire agreement that states that all of an employees inventions, whether or not developed on or off the clock and whether or not developed with company hardware - are company property. Similar, to be sure, but if you talk about a 360 work for hire agreement, people may get what you are talking about, but some may not. I don't think it is 'term of art' in the same way - even though I may use it as one.
One of the main improvements of capitalism over feudalism is that contract terms usually last for at most a lifetime, and where they don't they're at least limited to a piece of real estate.
That's not to say there aren't some good arguments for IP, but they sort of inherently have a planned-economy bent.
That's quite wrong. the very basis of IP is a state-imposed monopoly, which is the complete opposite of what capitalism is, what its basic principles are, and how it works.