Does absolute power corrupt absolutely?

Last week British retailer Marks & Spencer faced attacks from shareholders and members of the financial press, when Chief Executive Sir Stuart Rose was promoted to Executive Chairman.

23% of shareholders abstained or voted against Sir Stuart's re-appointment to the Board because they considered it went against good governance principles to have one person holding both positions, Chief Executive and Chairman.

This is an old debate and I think it's very easy to over-simplify it - right or wrong. The real answer, as always, is much more complex and depends on the substance rather than the form of the appointment.

If we start with what we're trying to achieve - a successful company - we can find case studies that both support and oppose the appointment.

In many large American companies (which Marks & Spencer is not, of course), the roles are combined. This has often been quoted as one of the weaknesses that led to the fall of companies like Enron and Worldcom. I think it's always a risk if one person holds too much power in an organisation, but the American system provides balance by having, usually, one or two other positions in addition to the Chairman and CEO: we usually find a President and Chief Operating Officer and, since Sarbanes-Oxley, the position of Lead Independent Director. So, in practice, this 'standard' American model builds in some real checks and balances on each individual.

What really matters is not so much the Board's structure, but how (and if) Board members fulfil their roles adequately. There's plenty of evidence to show that the difference between effective and ineffective Boards comes down to how Board members act, whether they deal with the tough issues and have the necessary debates, and that this matters far more than details about the Board's structure. If you've got the right behaviours in the boardroom, you can deal with deficiencies in the Board's structure or composition. But not vice versa.

As has been in the case in several of my previous 'posts', it comes down to the substance of the matter, not just the form.

Marks & Spencer will be an interesting case to watch. As an English company, it would not be typical to have the President/COO and the Lead Independent providing balance. However, my guess is that the Deputy Chairman and other Board members will be very conscious of their obligations to perform: perhaps we'll have material for another comment in a couple of years.