You can't use points as a penalty due to them being of varying 'value' to different teams and at different points throughout the year. 1 point to Mercedes is nothing, while to Manor its everything. 10% of your points after the first race could be nothing, while 10% after the last race could be tens of points.
And while people may not deliberately crash to get a free gearbox, it would be very easy to fake damage to get one. "Accidentally" dropping the gearbox, etc.
And while people may not deliberately crash to get a free gearbox, it would be very easy to fake damage to get one. "Accidentally" dropping the gearbox, etc.