The 'Avg. WAGE_RATE_1' table puts the Houston salary at 67K, the NYC Salary at 112K.
But Houston has no city or state income tax, and much cheaper housing, food, transport, and other goods. In fact, according to the Cost-of-Living calculators at...
http://cgi.money.cnn.com/tools/costofliving/costofliving.htm... ...or...
http://www.bankrate.com/calculators/mortgages/moving-cost-of...
..earning 112K in Manhattan is equivalent to earning only 48K in Houston. (112K in Brooklyn = 57K in Houston; 112K in the NYC suburbs of Bergen-Passaic NJ = 79K in Houston.)
So in terms of standard of living, 67K in Houston isn't so bad.