Tests for steroids conducted by WADA are not reliable

Recently Alan Abramson published an article where he discussed whether tests conducted by the World Anti-Doping Agency (WADA) were effective.
The WADA conducts many tests for steroids and other related medications every year. It seems that those that dope are caught. One may believe that the world of sports and professional bodybuilding will be soon cleansed from application of banned medications. For example, a lot of tests for forbidden medications have been conducted at the 2012 Olympic Games.
But several questions appear here. Are these tests sophisticated enough to detect any athlete that dopes? Are these tests efficient?
Let examine results of several tests. In 2010 the WADA publicized statistics according which 258,267 samples were analyzed by 35 WADA-accredited labs. Out of these samples 4,820 results were atypical findings. Circa 60 % of positives indicated about steroid use. Many positives were for cannibinoids. 10 % positives indicated about usage of marijuana. As you see, just 60% out of those who administered forbidden products applied steroids. Is it real? Don’t manifest the results of the tests that the WADA doesn’t do the job suitably?
Dick Pound, the former president of the WADA, considers that at least 10 % of sportspersons who participated in the 2012 Olympic Games administered steroids. He affirms that those steroid users that are not clever are caught by anti-doping agencies. He also confirms that a sportsperson who has been caught using banned drugs will fail an IQ test. He concludes that only unwise sportspersons can’t avoid detection.
So, when you hear that the WADA has conducted numerous tests to make sports clean, consider whether these statements are true. Is able the WADA to make competitions fair? Why does the WADA publicize about number of tests?
It seems that the WADA just desires to convince people that the job is done suitably. The WADA wants to secure future funds. This is the reality.