The ubuntu principle would generally not involve investing in military offense of any kind, in my interpretation - since military offense is not good for everyone.

"the democratic process eliminates the waste of public goods funding as people make up their mind in what they invest it in based on majority"

that is quite a naive statement that is not based on the evidence. huge amounts of public money get wasted as a result of choices made via alleged democractic processes. in most countries the 'democracy' is a controlled facade by design that offers voters little in the way of real choice. no matter who you vote for you get roughly the same direction in policy when push comes to shove and some of that is due to bribery, some to blackmail and some to just incompetence and heartlessness. controlling the opinions of the majority is not that challenging if you control the information flows in the world and deliberately manipulate thinking to disempower people - which is exactly what has been done for a long time on an industrial scale.

"if i dont plan to have kids what good does investing in education do for me? in that sense ubuntu does not make sense"

you choose what you invest in - that's good for you and unless you happen to control most of the resources, it's not necessarily bad for anyone in principle. part of the problem people have with this kind of free thinking is that they are so used to being controlled that they can't see beyond the box of control and imagine that it is possible to live without being forced to do something they don't want to do.

"we cannot eliminate someone being overpowered as not every snowflake can have their own way the world works"

every act of overpowering has a cause - which can be understood and changes made so that the causes no longer exist. 'the world works' as we align to direct it to work - what evidence do you have that the world works a particular way and cannot change? do you deeply understand the causes of and mechanisms within what has been called 'the human condition'?

as far as ID oracles for steem goes - I don't see that happening soon, though I know that steemit inc has plans for it and Voice on EOS relies on a new form of it using multiple smartphones. I'm not for it.