Let's assume that the government is also going to be mining the currency after publication/distribution of the blockchain
Not necessary. Government has other routes for profit (tax and production primarily).
for both profit and regulatory purposes, and only the citizens of that country will be allowed to participate in the mining process (how this can be legislated and enforced is one for the programmers, likely special wallets and machines limited to the regions IP range)
Would not happen, regulation is not feasible.
In order to prevent a 51% attack, the government should regulate the distribution of the mining equipment
See above.
The state will need to have resources to thwart any 51% attacks occurring from uneven hashrate distribution on the free market.
Proof-of-Stake could be used in the design along with other mechanisms that encourage spending rather than hoarding.
Correct, PoS would be important to prevent the 51% attack. I have an intuitive feeling partial PoW would still be good to have like PPCoin.
Include a few deflationary measures, such as a variable ranged fee per transaction that is destroyed, and there would be no need to put a cap on the ultimate number if coins to be created.
Interesting idea, deflation is indeed desired in the upswing. Nonstopping coinage doesn't feel right, but I can't put my finger on it why it wouldn't be just perfect to keep the max amount stable by destroying fees and minting coins continuously. Would it perhaps be difficult to keep the circulated amount stable?
government's chance to find a block will be a near constant of not more than 49%, they could Premine somewhere between the first 1000 and 5000 blocks. Using my min/max numbers, that would give them 50k/500k coins to start.
Government doesn't mine, so most of these calculations doesn't apply. What's the basis of your figures, constant income from mining?
Thanks for letting me play, Hope I win!
There are no other serious contenders at this phase
Your new currency will need to earn trust and you can not earn trust by saying "Hey, give me your money, I own the bank"
The bank does not ask for money, it almost exclusively gives money (coins) out. In my opinion that's a competitive way to earn trust.