Of course, the authorities don't need everybody's money, they have enough or can get enough.
It are the people relying on the money brought in by the retirees needing the money.
But that is if no interest whatsoever to the authorities.
75,000 retirees in Thailand?
If I see the number of retirees from the Netherlands, a country of 17.5 million, 5000+, the number you quote seems to be silly.
By the way, 75000 retirees each bringing in 65000 baht per month is quite a hefty sum of money, 58,500,000,000 baht that is. Translates more of less info 60,000 people doing a living out if it, minimum.
Be a tourist, be a retirees? Yes, if the rules are reasonable and not changing all the time. But, you will not like this, but the way retirees are thought about puts them all squarily in the criminal corner.
Obviously you like that.
Might be interesting to find out how many retirees have disappeared from Thailand in 2019, Vietnam and Phillipines are favoriete. In my friends circle, of the seven three have gone elsewhere, for a combination of the baht, rules and Feeling unwelcome. Yes all were real retirees with more thank enough income per month.