I can see the argument of tightening up during a downturn to throw extra at the market because, it really is above and beyond. A lifestyle that could NOT be sustained for years on end without mental or physical harm but that is harmless in the short term.
I think that's why people don't jump all over it.
(Also the dollar amounts are so negligible, if I cut my entire food budget in HALF *saving 100-200 a MONTH* it wouldn't matter much against the 5,000->9,000 we save monthly. Who cares if its 5k or 5.1k saved that month, my savings rate probably wouldn't change a full % point)