Glad Thailand is joining BRICS.... Only makes sense when all of their neighbours are joining too.... Don't think it will impact their currency on the short term.
The day prior to departure buy an outbound ticket on onwardflights.com the ticket is good for 3 days and is canceled when you don't pay for it. The service will cost not much more than $10.
yes but if your not paying tax at home, you won't have a bank account there, so your probably going to be at the maximum tax. Unless your extremely poor, which seems unlikely.
no but I saw it on the Thaiger News. Remember the Thai language doesn't always translate well. Unlikely the tax agreement is only federal government workers... The Thai government was clear that this isn't a tax grab for retirees to be concerned about. There are some grey areas!