Hairshirt

He is practically a total abstainer and I can affirm that he sleeps on a straw litter and eats the most Spartan food, cold dried grocer’s peas. He wears a hairshirt winter and summer and scourges himself every Saturday.

Source: wiktionary

And when he went on to say, “The curse must be within ourselves,” Muir bequeathed us a hairshirt: the guilty conscience that plagues so many of us when we see what we are doing to the rest of nature.

Source: wiktionary

The gloomy contentions of “hairshirt economists” who want more public and less private spending were assailed today by Robert W. Sarnoff, chairman of the National Broadcasting Company.

Source: wiktionary

No hair-shirt ascetiscism, but far less consumerism, less shopping for the sake of shopping, less conspicuous consumption, less waste. There will be less trade, but it will be more judicious, and there will be more 'self-reliance' in energy, food and manufacturing.

Source: wiktionary