"If these large businesses (for example, Amazon or Tesla) have onsite medical clinics"

OMG, I forgot those existed. Where I worked, one of the security/medical people had lost weight eating cereal for all meals. They held forced attendance meetings for us under "health training" where we all had to listed to how his miraculous weight loss program involved eating only cereal, every meal. And any time you stopped into the medical office, the doctor was out, so the security guards on duty got to "treat" you. Our Doctors were named Hope and Pitman, but we called them Hopeless and Pitiful.