This. ^ I am appalled by this behaviour @Spotlightdeck but sadly it is quite common. I have extended family like this, and this is why I ghosted them around a decade ago when my folks died. They were scavenging, grabby fuckers too. Some years ago, I was on a good salary in a professional job and had a 5 bed detached house (that DH and I had worked bloody hard for!) and they thought we were the 'rich' ones in the family. (And 'privileged!)
We weren't privileged or rich, we just worked hard! AND we didn't smoke 30 a day like most of them, or waste money on scratchcards, lottery tickets, 3 nights a week at the pub, expensive SKY TV packages, pricey mobile phones, and naff designer gear. Oh and we also had JOBS. Most them didn't, or they worked part time. They were always crying poverty and moaning that others had more than them, and letting other people pay for them when they went out to a pub or restaurant.
I got some money after being made redundant once - around 30 years ago - around £5,000. Not a massive amount, but still a tidy sum. Probably £10,000 in today's money.) 2 cousins and 2 aunts immediately contacted me, to say they saying the needed money for this, and that, and the other, as they had no money for it.
I said 'how are you going to pay me back if you haven't got the money to pay for said item?' They said they would pay me back at £5 a week. One aunt wanted £350. I said no. Caused a right rift that did. Apparently I didn't even earn that money and should have shared it with 'relatives.' 🙄That is just one story of many over the years, and it only stopped when I moved out of my hometown and ghosted them
Same aunts and cousins were always cadging, scamming, begging, and pleading for things off people, and rarely bought anything or paid for anything. Glad to get them out of my life I was.
@Bex5490 - at 16.44 - if YOU are happy to have greedy, scrounging, begging cheeky-fuckers in your life who try to rob you of your hard earned money, because you earn more than them - then good for you. Most of us have a higher bar when it comes to the way we are treated by people, and won't take any shit.
I would never have anyone paying for me all the time, even if they were millionaires. I have self respect, and dignity, and think it's fucking disgraceful to let someone pay all the time! (Sounds to me @Bex5490 like you may be the same sort of person as the people in the OP's extended family - and mine, as you appear to think their behaviour is OK!) 
As has been said @Spotlightdeck ghost the fuckers. Cut them off. They're parasites!