How did tax reduction lead to increased economic growth and prosperity in the 1920s?

As tax rates were cut in the mid‐1920s, total tax revenues initially fell. But as the economy responded and began growing quickly, revenues soared as incomes rose. By 1928, revenues had surpassed the 1920 level even though tax rates had been dramatically cut.

Explanation:

mining and farming towns developed

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the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.