Have you sat down and had a good, long talk with your father about his life and his disappointments? Maybe if you can get him to open up a bit, you might be able to figure out what is causing him to increase his drinking. Depression is about things in the past and anxiety is about things in the future.
Unless he's willing to see a professional or go to AA, he may not quit. Just like the MLCers, he will have to be the one to either seek professional help or hit rock bottom.
Have you tried going to some of the meetings for family members? They may be able to provide you the support and guidance you need.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
