Hey Helen. You might want to check out chapter 9 of Scruton's recent "Fools, Frauds & Firebrands". It's *exactly* your topic. He sees things a bit like you - PM is primarily political - though a more restricted take on what constitutes PM. He calls it the "nonsense machine".
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Not all of it is relevant, but that particular chapter is right on topic. He basically argues if you want to understand what's going on in postmodernism don't look for meaning - it's actually a political intervention designed to place adherents on the side of "justice"/"good".
I think he views Foucault in that way - but when you get to people such as Deleuze and Guattari it's a bit more difficult, because most of their work is quite literally incomprehensible. Same with big chunks of Lacan. I literally can't understand it.
