A few things here silver, unfortunately whatever your personal opinion about the power of people's protest, historical evidence proves your wrong, nothing we have achieved was handed willingly, there has always always been opposition, and things have had to be fought for using protest as one tool, be it civil rights, universal suffrage, or workers rights such as sick pay and holiday.
You are also wrong to say that left wingers think all conservative voters are rich, if this was the case they would never be in power because there are simply not a majority of rich people in the uk.
I am always intrigued by the answer of self sufficency. What does this really mean, truly are any of us "self sufficient ". Unless you live on a patch of land where you grow your own veg, rear your own animals, generate your own electricity, harness your own water supply, heal yourself when you are ill, educate yourself and only travel on your own personally dug roads you are not self sufficient.
We all live in a society, this gives us the benefits of civilization, infrastructure, healthcare, education, art and literature. These benefit all who live in society. But the way in which our society is structured means this, most people work, and work hard just like you did, they are payed usually the very minimum that can be justified and there life is basically a struggle to afford basic life necessities. There are then the very few in society who mostly through circumstance of birth are very wealthy, and benefit from the fact that their wealth allows them power over those who do not have as much.
We all believe that people shoul contribute as much as they can to society, but some people through no fault of their own, need a safety net, and the support of those in society who can.
Im sure you would also agree that, although it may not be obvious, there are many ways to contribute to society, not just through work.
Once again I have absolutely no truck with behaviour such as spitting or violence, totally condem it. However, our media, that is owened and controlled by people whos vested interest lies with keeping the Tories in power, always chose to highlight these events, as though they were representative of the demonstrators as a whole, rather than focus on why 80,000 had taken to the streets.