Your country is welcome to continue allowing the poor, uneducated, and mentally incompetent to procreate. We'll compare average IQ scores again in a few decades.
Good luck making up your current deficit. (unless you are in South Korea, Hong Kong, Taiwan, or Japan in which case we plan to surpass you on all lists)
http://www.photius.com/rankings/national_iq_scores_country_ranks.html
Heh. IQ is a particularly useless metric with regard to measuring intelligence, moreso when trying to apply such a metric to entire populations. IQ is a relative rate of learning, and was never intended to measure actual intellectual ability. It was intended to measure the memory retention of applicable data; in mentally defective persons. By definition, 100 is the average score of a 'normal' person; and is similar in usefulness to the 20/20 vision measurement. Numbers close to or better than average have no practical meaning, and everything is measured relative to a given population. Put another way, if your society is, on average, increasing their IQ; that means that your society is improving relative to prior generations not relative to other societies at the same time. Standardized IQ testing cannot measure people from significantly different educational backgrounds, nor people with different first languages. This is one reason that homeschoolers in the US consistantly crush these kinds of tests even though they come from across the class & racial spectrum in the US; the tests are designed to measure students from an 'average' educational background, and have no practical way to account for the differences in the quality of educational backgrounds. While this would imply that the deviation of IQ scores could indicate relative improvements in education (something that I would admit is intuitively likely for Singapore in particular), it's more than the evidence can support to use such metrics as evidence that US poor children are uneducated relative to other countries. The truth is much more complex.
And the definitions of what is "poor" in the US should give anyone else pause, since only 2% of the official poverty level American household is actually homeless by any standard; and the average poverty level household is likely to have at least one adult with a cell phone, one car 7 years old or less, one flat screen television, one computer, either broadband internet service or cable tv, and more square footage of living space than the average middle class household in 90%+ of the rest of the nations on Earth, including every nation in Europe be they wealthy or not.