Earlier quoted context omitted.
Which is incredibly difficult in the public sector. Yes, there are various financing instruments available for capital purchases but they're always annoying, slow and complicated. It's much easier to spend 5k per month than 500k outright.
Your numbers don't line up, if you are spending 5k in cloud costs, and on prem is 1/3 of cloud. At 48 month replacement cycle, 1/3 of 5k * 48 months is 80k. So it is 80k vs 5k a month for 48 months. I think the primary reason that people over fixate on the cloud is that they can't do math. So renting is a hedge.
Even spending 10k recurring can be easier administratively that spending 10k on a one time purchase that depreciates over a 3 year cycle in some organisations because you don’t have to go into meetings to debate whether it’s actually a 2 or 4 year depreciation or discuss opportunity costs of locking up capital for 3 years etc.
Getting things done is mostly a matter of getting through bureaucracy. Projects fail because of getting stuck in approvals far more often than they fail because of going overbudget.