Effort can take the form of standing on the street holding a sign, and it takes money to make a sign, and time to stand there.
It can take the form of going door to door and talking to people and giving them printed materials. You need the money for the printed materials, and the time to canvass the neighborhood.
Same for running for local political office.
Same for making a documentary, or a podcast, or a YouTube channel.
Same for running a Facebook ad.
Communication takes time and money. Getting money also takes time, to earn it, to inherit it, to ask donors or investors for it...
There’s no way to have any communication at all without these elements.
Those with money can pay someone to tell someone else something.
Those with time can tell everyone they meet.
That's how a democracy. Some have bigger voices compared to others.