They do have the same rules....
The Embassy has to issue a verification of income (actually pension) letter, or have 800k in the bank, or show 65,000 baht into a Thai Bank each month for a retirement extension! Many years ago, one simply could show evidence of income..... from whatever source it came, then a later requirement of the Embassy verifying this income came in. A subsequent request by immigration that Embassies really verify this income, not simply do stat decs or affidavit (which do not verify anything) subsequently caused few Embassies (UK, USA, Oz and Denmark) to balk, and stop their verification letter service.
Personally I think they should make everyone have the 800,000 baht in the bank... but it would be bad situation to preclude people living on pensions without savings.