Can a Democracy become an Autocracy: a Plutocracy; or an Oligarchy?

Can a Democracy become an Autocracy; a Plutocracy; or an Oligarchy? The answer is 'Yes', but its not so easy. Certainly an 'Individual' who comes from the 'Many' in a Democracy who is 'Equal' and 'Free' has a Right to exercise his/her 'Political Judgement' in whatever 'Direction' or manner that He/She pleases. 'They' also have a Constitutional Right to live in 'Equality and Freedom'. A Real 'Democracy' exercises these Freedoms and Rights in a 'genuine manner', and the People at the Bottom, enjoy their Equality and Freedoms and they will miss them if they are ever taken away. However, the 'Political Positions' of 'Power', at the Top, are 'Open' or 'Available' to anyone or everyone who wishes to participate in Government and that's the 'basic reason' why Political Candidates should be well qualified to 'Govern'. If someone wants to be CEO of a 'Major Corporation', will that be permitted, if the candidate is a 'nice Guy' or 'Women' and is a 'popular' candidate. The answer is No! Of course, you will say, but that's not an 'Elective Position'. True, although there is an element of 'Electoral-ness' as well as an element of 'Qualification'. But, I guarantee you, the 'Qualifications' must be there, or the Board will not choose 'him' or 'her'. The Individual must be 'knowledgeable' in the area in which She or He 'will function'. Governing a 'Corporate Entity' is not a 'Democratic Process'; its more of an 'Autocratic Process', with a little bit of 'Nice Guy' thrown in. That's exactly why a successful CEO cannot just 'Govern' a Democracy, unless he is also qualified to 'Govern' a 'Political Entity'. So why don't we, somehow, monitor or 'set qualifications' for those who want 'Political Positions of Power'? Of course, at this point, you will say, hey, we live in a Democracy and anyone who wants to Run can Run for Office. So, does that mean that if your a Billionaire, or, a successful Businessman you are also 'qualified', by that fact alone, for Political Office? I don't think so! If you don't believe me 'look around'. Today,the 'Top' has been 'taken over' by 'Millionaires and Billionaires'; the 'turn-over' at the Top is unbelievable, and that creates 'instability'. 'Political Instability' in the 'Halls of Power' is never Good. In such a case, the Top becomes 'Dictatorial' and the Social becomes as unstable as the Top. Where are the Real Politicians? Only a 'Real Politician' can restore 'Stability' in 'Democratic Government' and 'Freedom and Equality' in the Social.