What is the ruling on paying bribes to government employees to get things done and to cover their drinking expenses so that rights are not lost?

The question is about the ruling on bribery to prevent or remove injustice, and the ruling on buying alcohol for an oppressor so he stops his oppression. Buying alcohol is forbidden because it is an aid to sin. One can buy something other than alcohol, such as food or gifts. However, if alcohol is specified and there is a necessity in the matter, then there is no harm.