Not sure how you would define the exact number of tasks per contract as opposed to hours though. (In wider industries).
Surely if everybody at work is finishing a few hours early every day then everything is done and there isn't any need for over time?
Few things:
1. It would be impossible to implement across every job as each have different needs/aims. A shop till worker will be needed on a time metric as the workload doesn’t ‘go down’ as you complete a task (i.e. serve a customer).
2. Overtime is a bit of a sham anyway in my opinion. I know people personally who will slow-play the working day knowing they will get OT opportunities as a result. OT is only really a solution when workload spikes unexpectedly.
3. As per my post above, it doesn’t matter to me, you or anyone how long a task takes if it’s done and done correctly. Couldn’t give a flying fuck if Evo is the Lewis Hamilton of the bin man world and his crew complete their round in 3 minutes. Crack on.