I haven't read your previous thread Curtains, but I can hazard a guess from other posters' comments.
You say you can't divorce because you are Christian. What support is the church giving to you and him? Have you gone to your minister/vicar/priest and asked for guidance? I agree with ElspethFlashman - your husband is Christian in name only, and you are sacrificing yourself and your children without questioning it. Do you really think God and Jesus work that way?
Now, as to some practicalities:
As to his drinking - he won't stop, but you need to stop financing it. Your salary needs to go into a sole account, he needs to have no access to money or credit that can land on your shoulders. Cards need to be cut up!
As to this tab at his 'friend's pub - I would go down there myself and tell him straight that you will no longer be financing it. And indeed, as he knows your husband is unemployed yet invites him to lock-ins and plies your husband with booze on credit, you're wondering how this would affect his licence when it comes up for renewal. NOW IS NOT THE TIME TO BE NON-CONFRONTATIONAL.
And you really really need to consider the effect of this on your children. As others have stated, raising them this way could have far-reaching consequences. If you won't protect yourself, at least protect them.