The 'ordinary workers' are the fodder, but they're not the people behind it. Farage and Griffin aren't 'ordinary workers'. They're men with an ideology, who have cynically exploited people's anxieties.
I don't really like the term 'ordinary worker' or 'common man', because it sounds as though people are born into a social class which they can never leave. In reality, most people are workers, because they have to earn a living somehow. Some people have the potential to earn more than others and to gain higher social prestige by virtue of any talents they have. Some are born into more favourable circumstances. However, most people with good education and mentoring can make the best of their talents. Unfortunately, some people don't have good mentors and there is still a distinct anti-intellectualism in some families. They resent authority from the start and rebel against it. That's fairly normal for teenagers, but if they miss the boat and leave school with no idea where they're heading, they're not going to get very far. That probably wasn't quite so important when there were plenty of jobs in manufacturing, but these days teenager shave to be a bit more savvy. Many of those ending up in populist right-wing groups are those who were left behind.