I'm not one that really follows staking plans but starting to show some interest as my level stakes seem to be on the right track now

If you had the following staking plan as mentioned below

1 1 1 1 1 1 1 1 1 1 1 1 ( 12 losses ) then progression 2 3 4 5 6 7 8 9 10 12

Lets say you have 100 bets in the year.
What are you chances the winner falls in the 1st 12 bets (no losses in 12 bets) against the last 10.
I would say highly likely more than 50%.
If you have more chance of getting a winner in the first lot of 12 bets why would you not have a higher stake at the start vs at the end. Is this due to bank size?

I understand the higher stake comes from trying to recover the loss in some degree, but wouldn't the more profit generated be used as the reserve.