The solution leftists offer is to organise the working class against its oppressors. This is a tedious process because of the lack of knowledge the average person has around this topic (otherwise you wouldn’t have had to ask this question). The working class will always have their numbers in their favour, but in order to effectively overthrow the ruling class they need to understand the class relations in place. You can contribute by reading leftist literature on class relations and educating those around you. There are leftist reading groups in basically every city especially for this reason.