Even if it were a necessity of realpolitik to try to extinguish the royal line, if you don't feel somewhat bad about the murder of a blind girl who'd never directly hurt anyone (helped along in this case by threatening a child with death), you're missing some basic human empathy.
Right now, we have enough money, food and other resources to pay for everyone for the rest of their lives.
No, we don't. This is absurd.
99% of money is currently in pockets of 0,01%
I'm pretty sure those numbers are not correct. But more to the point, it is logically impossible for us to all live like rich people. Rich people do not have to work, but people do have to work for things to get done. There is no magic genie that can turn stored-up money into food and health care. If you "distributed the money" and people all tried living like little Elon Musks, they would soon starve to death because no one was growing and distributing food.
According to Figure 3 https://www.census.gov/library/visualizations/2022/demo/p60-276.html the top 5% of the US get 23% of the income. The top 20% get 52%. So if you simply eliminated the top 20% and spread their money around, the other 80% would double their aggregate income. (It wouldn't be that good in reality since the 20% also do some actual work themselves.)
US GDP per capita and median household income are both around $70,000, where a household is around 2.5 people on average. So again, if you flattened the money around, you could make people about twice as well off (ignoring second order effects). Which would be good, but is hardly "all living like royalty".
(Except insofar as technology already has most of us living better than French Revolution royalty in many ways, but that's already true.)