Very rarely does anyone ever serve time let alone even get convicted unless they are extremely negligent. Then often what happens is the person(s) are arrested with much fanfare to appease the public. However, then the case drags out or is quietly dropped. Alternatively, goes to trial, but case is dismissed, or is acquitted, or found not guilty. Or if found guilty, likely gets probation or does a little time with early release / suspended sentance. Extremely rare for anyone to serve out serious prison time.

Frequent viewers of disaster videos (ie. YT channels: Fascinating Horror and Plainly Difficult) are familiar with how the company / owners / executives often get off with maybe some low-level employee taking the fall.

In short, it's employee beware. If the pay isn't worth the risk, seek out something else. If conditions are dangerous, don't assume the employer will do much or care. Sometimes the only option is to quit.