Why do my insurance premiums and my deductibles have to double in cost to cover these people? Would have been much cheaper to just pay for insurance for these people or let them onto medicare.
My understanding is that the primary reasons for the cost increase are A.) the new law requires more comprehensive coverage that includes mental care, maternal care, etc.; more coverage = higher price, and B.) the health insurance companies are trying to offset the anticipated costs of covering more types of services for more people, especially those with PECs.
So even if the government simply paid for the insurance for these uninsured individuals, the insurance companies would have still increased their prices due to the fact that they still have to cover more people and more services. Plus you'd likely have an increased tax rate to pay for the government's footing of the insurance premiums.
After all we are only talking about 4,000,000 so far that have signed up. How can spending trillions to implement Obamacare possibly be worth getting insurance for less than 5% of the population?
That number may or may not be accurate, but there's a problem in that we can't pinpoint how many people have signed up "for/due to Obamacare."
That number you're quoting represents the people who have gotten insurance through the healthcare exchange. All the healthcare exchange does is assist you with getting quotes from private health insurance companies, as well as determining whether you are eligible for any credits to offset the cost of those quotes.
This means that people who were previously uninsured may be signing up for healthcare directly with the insurance companies, and not through the exchange. Even if we could obtain those numbers, there probably still isn't a statistical distinction between those who were previously uninsured, nor is there a statistical distinction between those who were going to get insurance anyways or only got it due to the ACA.
The same thing can be said in regard to the Medicaid expansion. 6 million people have signed up for Medicaid since they could start enrolling in the ACA's expansion of the public program. But that number includes people who would have been eligible for Medicaid previously, alongside those who are newly eligible, so we don't have real numbers as to exactly how many people this has helped.