Talking from certain experiences as a serial entrepreneur, while the CEO of a large, hospitality industry organization:

Make "per piece" or "per unit" pay possible as much as you can for ALL areas/departments/roles. But transparency and ease of calculation for the users/employees would be of the essence.
Equity.

For those who continue to perform the role(s) consistently and productively for a certain minimum period, say six months or more, may qualify to acquire a certain designation or get promoted.
Structure. Career growth.

Only when you're making profits.
Spin-off trigger.

Give me a call if you have any further questions or need any "clarity".

Regards
irfan