Anything that raises the pH of the urine can be a factor in urinary calculi. Baking soda has a pH of 9, which means it's a fairly mild base... I suppose one could make the argument that baking soda may contribute to increased incidences of urinary calculi.
Then again, rain water is said to have a pH of 5 whereas normal tap water is usually neutral at 7...are we increasing the risk of UC by offering water from the tap instead of natural rainwater?
Worms also raise the pH of the GI.. I suppose it could be postulated that a high worm load can also contribute to urinary calculi...do we increase the risk of UC by grazing goats instead of offering them unlimited browse or keeping them on dry lots with free-choice hay?