A lot of bills these days are fraudulent in nature. Some are subscription mentalities, eager to charge like municipal taxes, instead seem to miss the concept of delivering satisfactory service or goods. Others may be generational changes in perception as to what constitutes adequate completion and quality for final payment.
Medicine is a wasteland of overcharges and ineffectiveness. We are able to reduce major medical costs 90-99%(!), with better results, through cheaper overseas providers AND our own applications of medical freedom from FDA and US med mafia.
Overall, incompetence and grossly overpaid nobodies eat a lot of time on bad bills. They may aggressively report bad payment for false bills, while it takes time to settle anything fairly or correctly, if ever. May not even be worth it. F'em, we can do cash or not buy at all.