Read the following passage and answer the question:
'Load shedding, South Africa's system of planned power outages implemented by Eskom, has had a profound impact on the economy.
Small businesses, which form the backbone of local economies, are disproportionately affected.
Unlike large corporations, they often cannot afford generators or alternative energy solutions.
A study found that small businesses lose an average of R500 per hour of load shedding.'
According to the passage, why are small businesses more affected by load shedding than large corporations?