I fail to see how anybody makes a determination on a trip based on what the airport tax is. As far as I can see, the money in my wallet is blind and agnostic, it does not care if it is being paid to the airline, airport authority, cab driver or travel agent. Therefore, if the airport tax remains the same, but the overall cost of the travel in terms of air tickets is lower due to lower operating costs for the airline, I couldn't care less what they call it. Even if it is NOT lower, but the airline is able to enhance security checks, maintenance schedules etc., I am happy.
After all, it is discretionary spending, its not like I will convulse and die if I don't fly to Bangkok for a vacation.
The other thing is this, no one here has offered an intelligent opinion of what may actually constitute a reasonable airport tax. Is it $10? $50? $100? Any of those here who are being so critical of Tiger, perhaps come up with an educated guess? For all you know, Changi had been undercharging and Budget Terminal charges are in fact a true reflection of the actual operating costs. I'm not saying that this is the case, but before folk jump in with both feet, it would perhaps do them well to understand that NONE of the budget airlines are making money at this time, and only Tiger has some prospect of profitability in the short term. If you want to squeeze them hard, please go ahead, and maybe they will disappear from the scene altogether since their presence is so unwelcome.
Storm in a tea-cup, that's why I don't see the fuss.