It is important to understand the economy if you want to understand policy.

I quote from an article in The Economist:

America has around 197,000 medium-sized firms, defined as those with annual revenues between $10m and $1 billion, according to data from the National Centre for the Middle Market at Ohio State University. Together, they employ over 40m people in the country and account for around one-third of private-sector GDP (equivalent to the economies of India and Russia combined). 

Some 82% of medium-sized firms survived the dark years of 2007-10, compared with 57% of small firms. And although the survival rate among the 2,100 big firms (with revenue over $1 billion) was 97%, these giants shed 3.7m jobs during those years. Mid-sized companies, by contrast, added 2.2m jobs. This trend has continued as the economy has struggled back to its feet. In 2010-11, medium-sized firms increased employment by 3.8%, compared with growth of 2.5% by small firms and 0.8% by big business.

You would never suspect that there is a network of medium size enterprises listening to our politicians, much less that they are the job creators.