Class only a British thing? I remember seeing this thing on class structures in USA. The only difference is Americans can be more upwardly mobile however its more based on money and influence than occupation and where you live / was brought up. I think anywhere you go you'll have class structures although it might be called something else or even not recognised but it will be there. It is most likely based on haves and have-nots or money as much as who your parents were. One thing for sure the UK has one of the least upwardly mobile populations in the developed world. It is harder for someone from the bottom to reach the top or even middle than many other countries around the developed world. Off topic.
Realistically in this country you are not going to have to survive on knowledge and a bushcraft knife for long. Even in Scotland you can walk out in a day to somewhere. If you are injured there are people to recover you. The only thing you need to do is ensure you can get yourself out or to survive until someone does that for you. Either way that can come down to basic clothing and kit. Easier with better kit but still possible to survive in cheaper and even less kit with knowledge. I used to take enough kit to survive a night out when I walked in the Lakes in winter. Now I take less and rely on moving fast. If I can't move I know I have enough to survive both knowledge and basic kit. It would be an absolutely uncomfortable night though without sleep. Now I would actually go out deliberately for a night in winter with the kit I used to carry for emergency only. Things change with experience and knowledge but you don't.
Realistically in this country you are not going to have to survive on knowledge and a bushcraft knife for long. Even in Scotland you can walk out in a day to somewhere. If you are injured there are people to recover you. The only thing you need to do is ensure you can get yourself out or to survive until someone does that for you. Either way that can come down to basic clothing and kit. Easier with better kit but still possible to survive in cheaper and even less kit with knowledge. I used to take enough kit to survive a night out when I walked in the Lakes in winter. Now I take less and rely on moving fast. If I can't move I know I have enough to survive both knowledge and basic kit. It would be an absolutely uncomfortable night though without sleep. Now I would actually go out deliberately for a night in winter with the kit I used to carry for emergency only. Things change with experience and knowledge but you don't.