Re: It will cost us money...
I was reading the judgement from the 1772 case that confirmed slavery was not legal in the UK last night and they deferred judgement explicitly because 700,000/- was at stake - the 14,000 slaves in the UK at that time, valued at approximately 50/- each.
The /- nomenclature tends to mean shillings, but 700,000 shillings in 1772 equates to just over £5m now. While that may not seem a lot, relative purchasing power (e.g. by comparing Government expenditure then and now) puts it at the equivalent of £269bn of value now.
Then they explicitly discounted that financial implication and made the judgement based on the law and not its impact.