"David Hearn" wrote in message
...
For businesses handling cash is not a cheap thing - someone has to
take it
to the bank, which is risky, time consuming or costly (if you pay a
company
to collect). Whilst credit cards may have a surcharge to them, it
can often
be cheaper for them to pay that, than handle cash. Note, this is
exactly
why Tesco etc provide cash-back. Its costing them pretty much the
same for
you to take up to £50 extra out when they do the transaction -
whereas they
can get rid of £50 cash without having to bank it (or pay someone
to collect
it).

Supermarkets only offer cash back on debit cards for which there is
no charge (unlike Credit Cards) to the retailer.