Going to manual adjusting can be dangerous, however seeing such discrepancies with automatic, I tend to use manual unless I can't log in for a few days, or just a few minutes here and there (and thus could miss the "raise salaries" or "strike threat" messages).
35% is very high in absolute, but it also depends which categories are impacted the most, and which country you play in. Nonetheless, I'd still advise you to go to manual for a few game months so the gap can reduce. Then, go back to automatic if you want.