What kind of person do you think you'll get for those peanuts? $6 per hour is below minimum wage here. A PA is a skilled worker, not a cleaner.
While it can be hit and miss, just like hiring someone in your own country (in my case, the U.S.), if you screen them well you can find someone solid and reliable. One of my best VAs costs $3 per hour, but I had to go through 4 or 5 others before I found her.
For those of you outraged by those numbers, consider that a typical nurse in the Philippines will make $120/month, and a doctor will make $300-800 (http://bulatlat.com/news/4-37/4-37-sick.html or http://doktorko.com/_blog/index.php?mod=blog_article&a=1...). The president of the Philippines earns $1000/month (officially, that is).
Let me reiterate, in stronger terms: This kind of unregulated outsourcing is selfish, irresponsible and socially corrosive.