People who share an organisation's cause give effort a paycheck does not buy; people hired only for the job work for the money.

The claim

Hiring for belief rather than for capability alone changes the kind of effort an organisation gets. Someone who shares the cause works for the cause and will absorb setbacks, cost and repetition that a paycheck does not cover; someone hired only because they can do the job works for the pay and gives what the pay buys. The support offered is one historical contrast between a cause-driven and a reward-driven team, which cannot carry a general claim alone. The strongest counter-reading is that withheld effort is often a rational answer to incentives, not an absence of belief, so believers and non-believers may differ less than their pay structures do.