You don't have employees, you have investors. Companies can force limitations on employers because there's a discrepancy in power between them. It's obviously not the case here.
What good is it to have a miner that immediately sells, pockets some USD or BTC and then has no other cares? Mining is not an end to itself.
That's not true, most people only sell to cover some multiple of expenses.
What you really said is that pts price was way too high at the beginning. Now the cat is out of the bag because more than 1/3 of pts was mined.
The proper fixes to this are better (faster) difficulty adjustments and a much longer generation period. This way, miners are incentivized to think long term. Simple.
Let the market care of it, not heavy-handed restrictions, these are not going to work well.
The value of BitShares is NOT as a currency, but by the services it renders.
A currency is valuable because it renders services - a "store of value" service, a "transaction mechanism" service, etc. There's no fundamental difference.