In the modern day, the technology is there to communicate with someone instantly and consistently (i.e. wifi on aircraft now) this pilot was texting before his flight which is scary. You have that pilot in Indonesia who killed many due to financial reasons, Germanwings and possibly MH370. Its time to put greater emphasis on the psychological status of pilots even before they get their PPL.
IMO we should monitor pilots debts and medical occurrences more closely as well and the airline should have the right to privately see a pilots account or go more in-depth into the medicals to clear pilots yearly psychologically. They do this heavily with police officers (at least where im from). You cant become one if you're sole motivation is money, or you past or potential signs of psychological are of concern, they make sure of this. Im not saying its 100% guaranteed but at least due diligence is done.
Unfortunately we have idiots in this world who think its ok to take hundreds of lives with them when they cant deal with life anymore! - madness