Given that we don't have anywhere near all the information at this point, the below is a purely hypothetical point about a hypothetical set of carers.
What would be the point of sending the carers to jail?
Prison has 3 basic functions, deterrent, rehabilitation, and keeping the rest of the population safe. Punishment is not the point of prison (or at least shouldn't be in a civilised society)
So, will sending the carers to prison satisfy any of these criteria?
Rehabilitation - Does anyone really think that these people are going to come out of prison better, more well adjusted people, more productive members of society than when they went in?
Protecting society - These aren't murderers, they're not going to break into your house. They're idiots who made a colossal cock up. They're never going to be allowed into a position of responsibility ever again. They're nona danger to society.
Deterrent - This is the only potential benefit I can see, but is making an example of these people really going to make other idiots more careful? A tiny chance, if you ask me.
So we're going to spend a shit ton on money keeping these people in prison, for almost no benefit. Marvellous.
And for those who say punishment is the point. These people aren't violent criminals, they're not psychopaths, or sociopaths, they're going to have to spend the rest of their lives knowing that they caused immense harm to a small child, and the person they were supposed to be looking after. That all by itself is a worse punishment than prison is likely to be for them.