Hopi points to the paradox that whilst some of the left is talking more stridently, actual trades union militancy, as measured by strikes, is very low. A new paper highlights this disjunct between the political and industrial spheres.

Martina Bisello shows that there has in recent years been a job polarization; employment has grown in both well-paid and badly-paid jobs at the expense of middling occupations. She attributes this to the IT revolution which, along with other technical changes, has had three effects:

- it has displaced routine clerical workers.

- it has increased demand top-level employees who analyze and manage data.

- in permitting direct control of routine workers, it has reduced the efficiency wages these receive, and this relative wage fall has helped sustain demand for such employees.

I recommend the work of Peter Skott and Frederick Guy on power-biased technical change in this context.

Granted, this process hasn't all been bad for middle-income earners, as many, like Joan Harris a generation earlier, have moved up the occupational ladder. Nevertheless, it suggests that the squeeze on middle incomes has a basis not just in the macroeconomics of stubborn inflation, but in changes in the technical-industrial base.

This fact, however, is scrupulously ignored by the Labour leadership, which thinks of the "squeezed middle" as a purely political rather than industrial problem. To paraphrase Marx, Labour inhabits the "very Eden of the innate rights of man" that is the sphere of commodity exchange, and never troubles itself to consider the "hidden abode of production". The industrial and the political realms are thus separated.This surely represents a triumph of the Thatcherism which asserted "management's right to manage".

And herein lies my concern. Marx was surely correct to point out that a strategy that never inquires into the hidden abode of production is unlikely to succeed intellectually. So can it succeed politically?