What the 60 Second Economist is referring to is your economic Vote.
Believe it or not the economic vote has influence on politics and the economy.
Each £1 (or penny) spent is an economic vote.
Every time you spend some amount of money at your local supermarket you are essentially giving your vote to that company to stay in business over its competitors.
However, many “economic voters” become disenfranchised – resources go to where demand and profit is highest. What we mean here is that the poorest may not have much voting power in this kind of democracy.