Most of the numbers are going to depend on your job, your location, your lifestyle, your preferences, etc. Live in the suburbs and you'll probably spend a lot on transport, but less on housing. Live in the city and you'll save on transport, but spend more on groceries and housing. If you don't like your local schools, you may be faced with a choice of paying private school tuition, or paying a premium for a house in a nice school district. It's all variable! But I did want to highlight one thing:
You say you're spending "10% - loans (school loans, Credit cards etc)" and "3-6% into savings".
That's almost certainly a bad idea. And if you're actually carrying a credit card balance month to month, it's an INCREDIBLY BAD IDEA STOP DOING THAT NOW!
Explanation: When you think about it, it's pretty obvious that there's very little difference between paying a dollar on loan at X% interest rate, and saving a dollar at X% interest rate[1]. And I'm pretty damn certain that your student loans (and ESPECIALLY any credit card debt you have) are charging an interest rate well above whatever you're getting on your savings.
Or to put it another way, does it make sense to owe $1,000 on a credit card at 15%, and have $2,000 in the bank earning 5%? NO! Because at the end of the month, you'll have to pay $12.50 in interest on the credit card, but you'll only earn $8.33 on the savings; a net loss of $4.17. If you use half your savings to pay off the credit card, you're actually $8.33 better off every month.
So do yourself a favor, and pay off the debt as soon as you can. And ESPECIALLY the credit card debt! Compounding interest is not your friend here. Debt repayment is almost always the best way of saving.
Anyhow, to address your broader point: No, nobody is really saving enough. Everyone is going around feeling guilty because they think they're uniquely screwing up, but actually is very common. That's not an excuse to not be smarter than everyone else though. :)
If you look around, you can find a LOT of things which seem like you need them that really aren't. You don't have to do ALL of these, but... What matters to you? Percentages mask the bigger picture. Rent is pretty location dependent, but you can almost always cut back heavily on cell phone ($10/month prepaid. Mobile internet access is NOT as important as you think it is.), food (rice and beans are CHEAP and healthy), and a dozen other areas. Do you buy new clothes for non-work occasions? You don't need to. However many rooms you have in your house, you could get by with fewer. And smaller. Do your kids share a bedroom? If not, why not? It won't do them the slightest harm. And so on. The tendency is to look around and say "Bob has a big house, and Jane drinks two Starbucks a day, and Joe smokes, and Tim won't shut up about his Hawaiian holiday....how can THOSE people have all those nice things, and I can't?" But not everyone can have ALL those nice things. Prioritise. Pick a big house OR a foreign vacation every year. What matters to you?
([1]: Okay, sorta. Debt is often illiquid. If your car breaks down, you can tap your savings to get it fixed. You probably can't run your student loan back up to get your car fixed. Keep SOME liquid assets around (even if it's just a line of credit). On the other hand, there's always a risk that you might lose your savings - low if you're talking about FDIC insured accounts, but not zero. The risk that you might "lose" the student loan debt is probably a lot lower. Also, some debt - mostly mortgage debt - has a prepayment penalty, so keep that in mind too.)