The people wanting to remove Mugabe from power were, as the saying goes, "Stuck between a rock and a hard place."
A two-thirds vote in both houses of parliament was required to do an impeachment. The votes were not there.
The forceful removal of Mugabe by the military would have resulted in troops from South Africa arriving to put Mugabe back in power. This would not be to uphold democracy and the rule of law. Rather it would be a fear on the part of the Zuma administration that the military would then remove him from power.
Mugabe was offered "a deal that he couldn't refuse." He, his family members,and close associates have a pardon for all crimes committed and irrevocable shield against civil and criminal cases in Zimbabwe..
Now do not think that Mugabe is "happily riding off into the sunset." His ill-gotten assets are going to be under attack by governments like the US government and private organizations. Please study what happened in Malaysia with a big corruption scandal. Assets of over $1 billion US were seized. Malaysian players in the scandal found themselves with US arrest warrants.
Mugabe and his band of men and women will not be able to set foot out of Zimbabwe for fear of arrest on international warrants.
Jacob Zuma, take note, you're next!!!!!!!!!!