MPs' recommendation to forcibly break up the dominance of the 'big four' accounting firms to improve audit quality is fatally flawed. They should, instead, stimulate technological innovation to drive a higher level of performance throughout the industry - here's why.

More competition is healthy as a rule, but there is no clear reason why the number of firms serving the top tier of the market should relate to audit quality. 

Auditors study a company's books in complete secrecy. The only time the quality of this work is subject to competitive pressures is when something goes drastically wrong. 

Grant Thornton, for example, isn't one of the 'big four' but suffered terribly in the recent Patisserie Valerie debacle. Arthur Andersen was the biggest of the big five before it was killed off by the Enron scandal. Clear evidence that market dominance and audit quality are unrelated.

These big beasts have evolved because their brand reputation provides high profile audit committees with confidence. Any audit committee chair who recommends the selection of a non-big-four player knows they are taking a personal risk. The old adage, "nobody gets fired for choosing IBM," holds especially true, here.

Big four players are cementing this leadership position by investing staggering sums in new digital platforms; these reduce cost and complexity across markets, analyse huge quantities of data and feature new analytics that help produce a higher quality audit. 

These are hard measures for smaller players to match - and regulation won't change that dynamic. It may just drive up the prices of the larger firms as FTSE100 companies are forced to vie for their attention.

That said; there are some terrific opportunities for smaller players to increase market share. The focus of regulators should be on stimulating the vibrant mid-size market with technical innovation and collaboration. 

When these firms can publicly prove they reduce risk and cost for audit committees, they will win more business and change the market dynamic- that's how competition works. Many firms are already doing this - they're just not getting the recognition they deserve.

For communicators in mid-size firms this is the moment to speak with your partners and technology advocates and tell your story in a convincing way; through thought leadership, compelling internal communications, public relations, and advertising. 

Mid-size firms can do more to compete.