I think the main reason is that your average working class person, even if they have the money to contribute to that, doesn’t have the time and energy to get involved in politics. Looking at history, most people seem to be happy as long as they have food on the table, a roof over their heads, and some pretty basic rights, and only start to act when something big goes wrong, usually famines, but also things like plagues and cases of injustice that a lot of people hear & care about.

The reasons I think this doesn’t happen:

• most people don’t have enough interest, time, energy
• a lot of people don’t have enough money to contribute
• this would require lots of organization and connecting to others who agree with the idea
• it’d probably be easy to get caught, and a lot of the time (especially in countries where corruption is widespread) poor people will get punished harsher than the ruling class.