You can create variables dynamically, true. But that's not actually what you need here. When ever you have a series of scalars with trailing integers, use an array, and then you can access the array elements in your for loop. Also, using foreach is more idiomatic (which is a fancy word for "better written")

@foo = ('foo0', 'foo1', 'foo2', 'foo3');
foreach $member (@foo) {
    push @fee, $member;
}
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