Does STRENGTH add to damage in Ben Milton’s Knave?

The rules state: "Strength: Used for melee attacks and saves requiring physical power, like lifting gates, bending bars, etc." – I can find no mention of damage modifier. The main reasons I ask are:

  1. As scores go up to +10, I’m worried about over balancing when someone rolls a D6 damage and adds ten.
  2. Without any STRENGTH bonus, I’m worried the opposite will be true – at high levels a "fighter" will get usually some damage bonus – will it under-power PCs if there’s no damage bonus?
  3. If ‘yes’, does a ranged attack also add WISDOM bonus?

I have house rule but wanted to know if others had experience of the system.