Filing fees are controversial because they impede access to justice. Although American litigants complain about fees all the time (for example, it costs $300 to file a document in court in Los Angeles), the American system is considered to be quite plaintiff-friendly by lawyers.
Many legal systems have filing fees for complaints that are proportional to the amount sought. Thus, the greater the damaged sought the higher the fee to file.
Even when one seeks a waiver for grossly unfair fees, courts tend to waive only the amount in excess of the plaintiff's total assets, with the perverse result that just to initiate a meritorious case, an already severely injured or damaged plaintiff may have to go bankrupt.