To support development while making office buildings "healthier", Mayor Bizkit and her Planning Department propose a new type of floor area bonus in office districts that would provide additional floor area in exchange for better ventilation, better internal circulation, and office design in strict compliance with best practices with respect to social distancing in the workplace. Historically, N Rock has only offered a maximum of 20 percent additional floor area only for public benefits like publicly accessible open space and transit improvements. Given the importance of these public health issues here, new developments that comply with all criteria for this bonus can build up to 40% over and above the existing maximum floor area ratio (FAR) for a site in exchange for the required benefits.

Question: Irate neighbors think that a 40 percent bonus is too much and seek a way to strike down the bonus program. On what grounds can the neighbors challenge?