A restaurant might take separate card payments if everyone is paying the same, but not if people are paying different amounts.
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Restaurant bills within a group can be very different and not everyone wants to, or even can afford to, split evenly.*
My friends and I like to pay by card, we find it easier (and we can pay individually by card if we want to, although we generally split the bill equally). You prefer to pay with cash. No problem! Us finding card easier doesn't mean you have to find it easier; me using cards where available doesn't that you can't use cash if you prefer that.
It's all very well saying that paying for everything by card gives you more information about what you are spending your money on, but equally, if you're just tapping here, there and everywhere, there seems to be an awful lot of scope to spend more than you intended, in the same of 'convenience', such as the extra charges added by small shops and parking meters (while illegal, there's a lot of places that still do it) and splitting a restaurant meal equally when your own consumption was very small, because no-one has any cash and the restaurant won't take £10 from person one and £40 from person 2.
The OP asks why those of us who don't carry cash, don't carry cash. We are explaining why. We are saying why it suits us better and why we prefer to be cashless wherever possible
That doesn't affect you though. No one is telling you to stop paying for restaurant hills with cash
You don't have to use card if it doesn't work for you though. You don't have to split a bill equally if you don't want to. Paying for card gives me more information and I don't spend more than I need to. Your experience is different and that's fine. The fact you get on with cash better doesn't negate others getting on better with card and vice versa.
I always think people who don’t carry cash seem tight - they never give to charity collections or homeless in the street, office collections, tea kitty, tips etc etc How hard is it to carry a tenner and a few coins
That's a somewhat sweeping statement. I have direct debits to several charities and have made numerous online charity donations. Homeless I donate to my local homeless charity, and have bought homeless people on the street a hot drink and something to eat. Office collections are done online with an electronic pot at my work, because we're based in two countries and you can't pass round an envelope across the Channel. Tips go on card, or I get cash out in advance (eg I take a fiver with me to the hairdressers to tip the junior who washes my hair). Maybe your friends are tight and happen not to carry cash. Extrapolating that to everyone who doesn't routinely carry cash is patently ridiculous
Buses outside London don't take debit cards. Most of us still live outside of London. Although I use debit cards on London transport.
The OP asks people who don't carry cash why they don't carry cash. Posters are explaining why they don't need to carry cash. None of this stops you using cash if you prefer. Someone saying THEY use a debit card for their bus journey doesn't mean they're saying everyone else can or should. They're just saying what they do. Not what you should do. Someone who uses a debit card for their bus journey lives somewhere that takes them and they like this way of paying. If you live somewhere that doesn't have contactless payment for your bus and you prefer to use cash then I don't get your point. You do you and they do them.
Are the 'will not carry cash under any circumstances' people prepared to turn around and go home if they find that they need cash to pay for parking or food and drink at the seaside or a day out in the country?
No one here is saying they refuse to ever use cash point blank. We are saying that we don't routinely carry cash as a matter of course because we don't have any need to do so in our daily lives
If I need to use cash because card payment isn't an option, then I'll get cash out. It's not difficult! If I know I'm going to the seaside or for a day out in the country, I'll get cash out from one of the many many atms between my front door and the tube station or bus stop. I'm not going to find myself mysteriously transported there without my knowledge - if I know I'm likely to need cash, I'll get cash out. Or if I need cash unexpectedly then I'll go to the nearest atm. If I don't have cash and can't get cash out then I will just go without. But the entire point is that this rarely if ever happens, because it's easy to plan for those occasions where it's cash only. I don't carry cash routinely because I don't routinely need cash. If the down sides outweighed the benefits then I would go back to carrying a purse with notes and coins on me at all times. But they don't.