In this thread is a GQ discussion about stomach acid. I was going to add the following to my post, but figured it didn’t really answer the OP and I just had to share. 
During my internal medicine rotation (in med school) we often had to choose treatment based on insurance (Private or Gov’t) coverage. PPIs were not covered by medicare so patients with gastroesophageal reflux disease (GERD) sometimes did not get good control of their disease. H. pylori infection of the stomach is common and can increase lower esophageal sphincter (LES) tone which helps to prevent reflux. H. pylori doesn’t always cause ulcers, but it is a common cause and ulcers caused by it can often be cured by curing the infection with antibiotics.
So some people have GERD that is partly controlled by H2-blockers and partly controlled by increased LES tone caused by H. pylori. As mentioned, H. pylori is a common cause of stomach ulcers, so if they develop a stomach ulcer they get antibiotics to cure the H. pylori infection which lowers LES tone and allows stomach acid (poorly controlled) into the esophagus causing GERD and possibly esophageal ulcers/hemorrhage and increasing the risk of cancer. (If the stomach ulcer isn’t cured, it can lead to cancer or life threatening bleeding into the stomach among other problems.)
So for the poor (financial & health) people with reflux moderately controlled without a PPI who develop H. pylori ulcer it becomes a choice- reflux and potential esophageal ulcer/cancer or gastric ulcer/cancer. Not a pleasant choice.
I think plans were underway to change things and I hope they’ve panned out.
PC
Don’t know if this is still true, bu