One thing you seem to not understand is that the system cannot be gained the way you describe.
The votes behind a steam account have weight depending on how much steem the account has behind it. So if you create many accounts these accounts have little weight and this way might be worth less than one vote from one guy with more steem behind him.
Second to where the money is coming: again u seem to not understand what a blockchain is and how money and value works in general. All the payouts that people receive are mining rewards, just like Bitcoin pays miners Bitcoin for mining blocks. So coins are created out of thin air and have no value. The value comes from people valuing it by establishing a price for the coins on the exchanges.
The $ coins are created by people lending them into existence which also gets incentivized by the blockchain by giving this mechanism mining rewards.
I agree with you that some more transparency and explaination how the details work would be beneficial.
I found the white paper very fluffy and light on the technical details while being very long and repetitive of things that are not relevant.
Blockchain very convenient system, it is possible to transfer any amount of money for a couple of menut without taxes