I got well paid for doing jobs, but no pocket money. So for mowing the lawn (not as easy as it sounds - 1/3 of an acre with an electric push mower - a good solid day's work), I got £5. In 1982, that was enough to buy an album (big black vinyl thing to all you modern people) and have a bit left over. Washing the car, stacking wood, digging the garden, all yielded cash. This taught me the connection between working and getting money. Because it was my money, it also allowed me to waste it, then repent at leisure with whatever crap item I'd bought.
I'll start the boys on the same process when they are about 7.