One point per position. 22 starters? 22 for win 21 for 2nd and so on until 1 point for last. No point for disqualification. No bonus points.
The driver with the most points has the highest average finishing position, The championship is nearly guaranteed to go to the last round.
Not the best solution, you can win loads of races and still lose the championship, but at least it's consistent, not one race is worth X and next Y.