Financial agreement how it works?

A lot depends on whether you are married.
Get proper legal advice.

All I said was after a fair and equitable split including what she needs then of course he gets the rest of his salary. Am I wrong about that? Of course she should go to the sol, why was I being prejudiced???

ANd Jeaux's post is a perfect piece of misinformation, ignorance, and personal prejudice.

See a solicitor, they will get all the relevant information and advise you properly. Every case is different, and no one can advise you of your likely entitlement based on a few words on a talkboard.

Lots of useful threads on here. The starting position is usually 50/50 split of assets (house) and savings.

You said will he be allowed the rest of his wages they are his after a fair an equitable split and child maintenance etc

You really need to see a solicitor to go through all this. Mediation is far more likely to work if you have an idea what is reasonable and possible.