Times have changed, but the formula remains stuck in 1949. The wealth disparities between neighboring towns simply did not exist at anything like their current scale. The founders of the regional school system could not have foreseen the inequity their formula has imposed on most towns today.
The more difficult musical numbers are in the first act so don't be dismayed if you don't like some of them, because the second half of the show will fill your ears and heart with pleasure.