What happens when that labor wants better pay and safer working conditions? Things will naturally slow down, and it will be hard to maintain all the infrastructure that was built during growth years. The same applies to healthcare, yes it is egregiously expensive, and life expectancy is falling slightly. On the other hand, comparing the US health care system to India's is silly. Health insurance might have high costs, but the level of care you get is far better than what you get today in India. Ten years from now, that might be a different story.
But those numbers are meaningless for proving or disproving "inefficiency". The US is obviously getting far better infrastructure/education/welfare system/research/military/etc.
Is it?
Research is on shaky ground:
http://www.sciencemag.org/news/2017/03/data-check-us-governm...
https://www.scientificamerican.com/article/dr-no-money/
https://www.theatlantic.com/science/archive/2017/03/trump-bu...
http://theconversation.com/men-get-most-of-the-research-fund...
https://www.vox.com/2016/7/14/12016710/science-challeges-res...
Welfare system is failing:
https://www.washingtonpost.com/news/wonk/wp/2014/09/29/our-i...
http://time.com/5090112/infant-mortality-rate-usa/
https://www.npr.org/2017/05/12/528098789/u-s-has-the-worst-r...
https://www.propublica.org/article/die-in-childbirth-materna...
https://www.theguardian.com/us-news/2017/dec/05/america-home...
http://www.bbc.co.uk/news/world-us-canada-42248999
https://www.ssa.gov/policy/docs/ssb/v70n3/v70n3p111.html
Education is failing en masse:
https://www.theatlantic.com/education/archive/2013/12/americ...
http://www.pewresearch.org/fact-tank/2017/02/15/u-s-students...
https://www.npr.org/sections/ed/2016/03/10/469831485/america...
https://www.forbes.com/sites/robertreiss/2015/11/17/how-to-f...
Millitary is using shoddy, ancient tools:
https://newrepublic.com/article/113484/how-pentagon-boondogg...
http://www.spiegel.de/international/world/us-modernizing-its...
http://nationalinterest.org/blog/the-buzz/the-us-military-re...
https://breakingdefense.com/2018/01/hasc-ew-expert-bacon-us-...
https://breakingdefense.com/2018/01/armys-basic-illusions-go...
India's GDP: "The Gross Domestic Product (GDP) in India was worth 2263.79 billion US dollars in 2016."[0]
America's GDP: "The Gross Domestic Product (GDP) in the United States was worth 18624.48 billion US dollars in 2016."[1]
[0]: https://tradingeconomics.com/india/gdp
[1]: https://tradingeconomics.com/united-states/gdp
Your system is massively inefficient.