Yeltsin's delivery during his oath and the fact that he made no speech indicated that he was unwell, but his bearing when he walked to the podium suggested that the illness was not very serious.
They want to make sure that the question is not resolved, that they continue to fight. And they will be a permanent irritating factor in the Russian politics.
In order to get anything through sometimes you have to bribe, sometimes you have to co-opt a bureaucrat. There is no clear dividing line between business and state, between what is legal and what is illegal.