This could be solved by tracking those activities. Say GPS tracker attached to everyone. Decide certain beneficial point and then going under it or too much over it would result in losing credits.
This has nothing to do with the topic. Cost of maintenance due to usage for pedestrians is effectively zero. Putting more effort into quantizing that maintenance is separate from the infrastructure investment.
This (micromanaging) line of thinking toward maintenance is degenerate social policy.
ie Treating the cost of someone receiving benefits for which they did not pay (or otherwise deserve) is a catastrophic enough to desire more spending and bureaucracy to withold the benefit.
