The article claims a problem is that there aren't enough mid-tier positions, for those who have just acquired a PhD but aren't yet suitable for a professorship. What sort of solution could one imagine? Outside of post-doctorate positions, there's neither funding nor desire for the kind of research that you need to further an academic career.
But why not? If academic work is for the benefit of mankind, there should be a desire in society for that kind of research[0].
This desire is only muted because of commercial interests having increased influence (directly and indirectly) over academia.
[0]Perhaps there is a mismatch in what we mean by 'kind of research' here. But this is a political point as well - the kind of research that has long-term benefits to society should be exactly the kind of research that furthers academic careers.