In my opinion, giving kids an allowance should be something you either do or do not do, depending upon what the family can afford.
In any case, I do NOT believe an allowance should be tied to chores, because even though adults must work (do chores) for a living, that can be seen by and explained to kids...and kids are not yet adults, so the same should not be expected of them.
I think kids should be given chores and expected to do them, with consequences for failing to comply unrelated to allowance, but have some other penalty, such as being put on restriction, or not going to an event they thought was "all sewn up."
Family always comes first, and you do for family because they ARE family, and every member should help every other member, and that includes extended family such as grandkids and cousins, if they live nearby.
There are far too many kids today who would rather go 'hang with their friends,' than give grandpa some help raking leaves, or a pregnant mother with a heavy load of laundry. And if they help with these chores, it is begrudgingly, or with a "what's in it for ME?" attitude--translated as, "How much will I get paid?" You get paid in love, and mutual respect and cooperation, kiddo.
For when the chips are down and all your "friends" and acquaintances have dropped you like a bad apple, family is all you have left. Make them come first.