The stall strips ensure that the outer wings generate lift, when the inner wings have reduced or no lift, thus assisting lateral stability (and providing effective ailerons)
What would happen if the outer wing stalled first?
What happens if you take flaps and increase the lift in the inner wing section?
Reduced lateral stability.
I'm not quite sure what you're trying to say here. The inboard stall strips have no effect whatsoever on airflow over the outer sections of the wing, so cannot ensure anything about what they produce. If the outer section of the wing stalled first, you would have significantly reduced lateral stability and therefore pronounced probability of wingdrop close to the stall leading to possible spin. Taking flaps reduces the stall speed by increasing lift and drag at low speeds.
When you say "
the inner wings have reduced or no lift" do you mean that the wing is already at the stall?
I stick to what I said earlier - the inboard stall strips are to ensure that, clkose to the stall, it is the inboard sections of the wings that stall first, aiding lateral stability.