Typical of propagandists, Zuylen-Wood chooses not to mention the single-most important aspect of a story, in hopes that we will take his fractured journalism as fact.
Banks make their profit from each depositor by reinvesting their money at a profit. Some accounts are more profitable than others, but each enlarges the pool - as the saying goes "it takes money to make money" and we give them our money so they can make money with it. Traditionally, banks have not charged fees or given interest on small accounts, but the trend is obvious: to charge fees and only give interest on huge accounts.
If a bank can not turn a profit on the money I give them, they don't deserve to be in business.