Zimbabwe's finance minister Patrick Chinamasa has reportedly said that he "feels sorry" for "principled" ex-president Robert Mugabe, as his wife Grace took advantage of his old age.Mugabe, 94, stepped down from power following a military intervention "targeting criminals around him" in November.According to New Zimbabwe.com, reflecting on his unceremonious demotion by Mugabe through a mini cabinet reshuffle in October last year, Chinamasa said that he learnt about the cabinet reshuffle through social media, "as he was in Washington for a crucial government meeting then". Chinamasa said that Grace was moving to seize control of government for her Generation 40 faction of the ruling Zanu-PF, as she plotted to succeed her ageing husband. Emmerson Mnangagwa made similar remarks.Soon after he took over as president of the southern African country, Mnangagwa said that those around Mugabe had taken advantage of his advanced years to usurp some of his powers.Mnangagwa maintained that Mugabe "made no mistakes while he was in power"."We were having persons (other than the president) who were making executive decisions, which is against the constitution of the country," Mnangagwa was quoted as saying. * Sign up to News24's top Africa news in your inbox: SUBSCRIBE TO THE HELLO AFRICA NEWSLETTERFOLLOW News24 Africa on Twitter and Facebook.