How many hackers will be working on figuring out how to print new coins? You can bet that every hacker that has ever attempted to attack other coins will work to attack this one. They will never get caught. No way to know how many coins are really in circulation.
Zcash Corp is dangerously launching new tech with no means of auditing the blockchain or totaling coins in circulation.
The idea of the privacy is what draws you in but greed blinds you to the faults. Hypers are blinded by greed. They do not care that the system is seriously flawed.
That tax is one off. There will not be any tax after 4 years. You can say the miners will charge a tax or fee.