My Father has to my misfortune been a slave to "what other people think" all his life, he would often tell me that "what you do reflects on me" as though everyone knows who he is (he's a nobody like you, me and everyone else), and despite being a not particularly nice person himself. In later years he got himself on a board of a charity and ultimately became the chairperson, the same for a sailing club and again ultimately became "Commodore" (chair person), all the while continuing to be not a particularly nice person behind closed doors, and he still to this day has incredibly ridiculous foibles such as insisting curtains are always drawn on all the windows during the day (heaven forbid people walk past the house and think - "geez thier curtains are still drawn, they must still be in bed the lazy 'tards", and when drawn that they are to be drawn "evenly"; it's not OCD, it's because in his head people are walking past his £1.3 million home and judging him PERSONALLY on the fact the curtains are "uneven". When I started college at 19 (1989) he insisted I go wearing a tweed jacket, corduroy slacks, a shirt and tie, which he had chosen and bought for me without my knowledge - I think I was ONLY ONE in the entire campus dressed that way (remember it's 1989) - I did it for a week before having a very bad argument with him that ended in a physical altercation by him because I was "showing him up".
oh and that's just sparked a memory, at his wedding to his 2nd wife (I was about 11) he told his sister "make sure you and your kids don't show me up" because he didn't want his other guests, which were collegues and clients etc knowing his sister lived in a council house, and was a single mum with 3 kids (who then went on to become a paramedic, a Fireman and then Station Officer, and security staff at an airport respectively)
Some people just seem to go thorugh life thinking there is a sign above thier heads with thier name address etc and that other people are following them around watching what they are doing and keeping some kind of score, and although to some degree social media has made that a reality, for 99.9% of the worlds population, the rest of the 99.9% of the population JUST.DONT.GIVE.A.rubbish.ABOUT YOU. because they have no clue who you are, where you work, how much money you have, where you grew up, what school you went to and whether you are a member of the funny handshake brigade - which I forgot to mention my father is also a Freemason, oh and STILL uses Esq (Esquire) after his name for landmail as though that adds some kudos - without realising it actually makes most people think "pineapple".
I understand some of it is indoctrinated via the social customs of the time from thier childhood, and some others by forced indoctrination by parents, and yet more comes from a deep need for social status and recognition; that never actually arrives from anyone that matters other than from the other pineapples doing the same thing - but what I've never understood is that even after years of proof that no-one really cares, how someone can continue to beleive such nonsense matters to other people and allow it to become thier master.
(and just for the record, his money I've told him to shove it, not interested in having him laud that over me along with everytthing else until he dies, I still get my nose rubbed in my private school fees 35 years later.)