We don't. See My comment posted here. EDIT to add: Demo(n)cracy is ghastly - two wolves and a sheep deciding what's for dinner. Far better:
Solutocracy – A Way to Govern (article): https://blurt.blog/blurt/@amaterasusolar/5lw7tx-solutocracy-a-way-to-govern
Thumbs up, thumbs down, you're basically talking about democracy (ancient Rome) - a direct democracy that doesn't need “representatives.” Thanks to the development of technology and the Internet, we should return to this. I ask how you want to overthrow the current system?
Actually, since writing that, I grasped that thumbs down play little purpose.
No, it's not a "direct democracy." It's based on all who think They can help solve a problem having the ability to do so. With no "authority," and not subjecting People who it does not affect to anything. Like "laws" (legalates) that impose on Ones not involved.
As for how...
The End of (Social) Entropy (article): https://blurt.blog/blurttribe/@amaterasusolar/3wacvg-the-end-of-entropy
Just Stop Consenting! (article): https://blurt.blog/blurt/@amaterasusolar/4kmbbz-just-stop-consenting
AND
Join Me as a Sovereign Here on Ethical Ground (article): https://blurt.blog/blurt/@amaterasusolar/zbtrk-join-me-as-a-sovereign-here-on-ethical-ground
When enough of Us stand, when We strip Their tool to power away, They will have no more power than You or Me.