WHY DO THE POLITICIANS WINGE ABOUT BUSINESS?

The MPs winge about the need to support business (for fear of losing their seat).  But they are not really concerned about British business.  Their concerns are about international business. They say that goods should arrive just-in-time for us to put the pieces together, and never mind about the environment.  Does it occur to the politicians that we could manufacture complete items (we used to) avoiding the transport of goods across continents, reducing pollution and traffic congestion at the ports, and boosting jobs in design and manufacture in Britain?