I'm not sure why the poster seems to have this view that 'Whitehall' is some kind of masonic lodge either. It is literally thousands of people, all with quite different criteria to work towards. This idea that 'Whitehall' wants to crush Liverpool because it is a constant 'thorn in its side' is very self-congratulatory (shock).
Liverpool, like the majority of the North, suffered under Thatcherism because there was no immediate and clear economic gain to be had from investing there. The easier option was to focus more on services and in London/South East.
Of course, rather than accept this, this scouser has gone for the romantic claim that Thatcher didn't invest there because the collective voice of the scouse had apparently called her out before anyone else, and rang the loudest and truest. Later on there is fleeting reference the abundance of other cities that suffered, though of course, no Manchester...
They suffered because she saw little worth there, not because she was fearful that their crusade might lead to her downfall.