It’s not just the housing that they don’t pay taxes on, but often the lower rate that they in turn end up paying on that part of their tax that isn’t exempt. So the numbers you quote are deceptively low in terms of actual income received.
I think we might have fewer clergy voting and preaching as liberation theologists if they weren’t in effect subsidized heavily by the government. Either way, however, it is hard to justify the employees of religious organizations getting preferential tax treatment—even if the churches themselves are tax deductible (which always seemed off to me as a benefit in its own right).
“It’s not just the housing that they don’t pay taxes on, but often the lower rate that they in turn end up paying on that part of their tax that isn’t exempt.”
That is no different than just like the “lower rate” any taxpayer with deductions gets to after the deductions are taken.
Actually, with the average salaries so low and depending on their actual housing costs, many ministers are no different than the average taxpayer - taking the standard deduction, which is generous, instead of itemizing deductions.