It is obviously bogus that Foucault raised that issue in 1975. For example Erving Goffman introduced the term "Total Institution", which implies total surveillance already in 1961. Subsequently, there have been many public reports concerning the information society and the problem of data bases. For a legal assessment see Westin, Columbia Law Review 1966, pp. 1003ff.
It's not 'obvious'. The goal of that chart is not to be a perfect representation of history. It's to show 'greatest hits'. Foucault was a superstar-philosopher who was a regular TV guest. His panopticon analysis is way more widely know than Goffman's analysis (as much as I love Goffman).
Sure. But why this urge to rewrite history then? Just because Foucault is the grandfather or surveillance studies? Why forget all these older and more fruitful discourses?