In my opinion Wilson was no worse than virtually any UK Prime Minister or politician since WW2. Almost without exception they have all presided over the willful loss of the majority of British engineering and manufacturing. Buffle-headed dandiprats the lot of 'em!
I question the "willful". I remember Wilson talking about "the white heat of technology." I remember that Wedgwood Benn was a strong advocate for Concorde--now there's irony. Maybe they weren't so competent in doing stuff, but in that they would have been following the business methods of British management, which managed to comprehensively foul up a lot of industries (I mean, if anyone ought to be shot as a traitor, surely it's the managements that approved production of the Allegro and the Marina).