I know there is no malice to your posts, but I think it would be short sighted to say it's only as expensive as it needs to be which implies to me that it's not out of reach for people. I understand some people keep them on the side of the road, which is of course a extreme, but even £100-200pcm is a completely unfathomable amount of money to a hell of a lot of people; and I can't see you keeping them for much less than that, unless you own land which is a whole other story.
I'm not saying I agree with this classification but the Oganisation for Economic Co-operation and Development define middle class as the following:
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I agree that the class system is something used by people purely to try to justify their (often) envy or derision for another section of society when they are otherwise unable to substantiate their anger. I usually find that it's a weapon used by those who consider themselves 'lower' in societal rankings than the people they are trying to get at. I wouldn't let it get to you, the fact that the class system or the idea of it bothers them that much says more about them than anyone else. I refuse to take any notice of class, although by the above I would be considered middle class which is a new thing to me! I consider it the same as race, gender or sexual preferance.. I choose not to see any distinction in any of it, everyone is treated the same, without judegement or bias.
My ex-boyfriends mother always hated me because she said I was a stuck up posh bitch - this opinion based solely on the fact I worked full time lived at mums in a house she owned and owned my own car. I was 17 at the time so I'm not sure exactly what else she had to base this opinion on, I never once treated them any differently to anyone else - but it is what it is.