Is bottom decile consumption a good measure of economic health? In a way it seems it could signal the opposite, ie in the past the bottom decile was saving that money in an effort to change their economic conditions vs spending it now could indicate a lack of hope for upward mobility.
To your example it seems worth noting that the quality of the air travel experience appears to decline over time as well.
To your example it seems worth noting that the quality of the air travel experience appears to decline over time as well.