There's two types of policies.
TPD= Total & Permanent Disability. This is usually a lump sum payout for defined permanent injuries, usually attached to life/super policies. For example, paraplegic payout $250K, loss of use of one eye $25K etc. The condition must be permanent and usually no payout is even considered for a grace period of 1 year etc to make sure the condition is permanent.
Then there's IP= Income Protection. This pays out a wage when you cant go back to work. There's usually some waiting period, you can select 1 week, 2 weeks, 1 month etc but benefits generally cannot exceed more then 75% of your earnings (after expenses but before tax)in the preceding 12 month period. Sometimes depending on the company there may be a TPD attached for a defined event. The length of time the benefit is paid out for is also determined when you buy the policy, 1 year, 2 year, 5 year, life etc.
Lets see how these would work in MB's case. Whilst he's laid up he'd get a wage after the qualifying period. The wage wouldn't exceed 75% of his earnings. If his foot got better and he went off to work in 6 months time the payments would stop.
But lets say his foot went bad and they cut it off then he'd hope to have a TPD lump sum benefit. Otherwise all that would happen is they'd pay him his wages till the benefit period expired.
Hope that helps, that's pretty much how it is here. TPD benefits are hard to claim and many end up in court as many people want to claim the lump sum when they still have some use of the affected body part, for example you ain't blind in one eye but have 50% vision ... gets ugly!