To use the word refused is disingenuous and inflammatory. These will be claims which did not meet the criteria. Inviting people to make a claim is hardly mental cruelty.
The whizzing letters:
Pensions minister Torsten Bell, in a parliamentary response, stated: Over the coming weeks, as part of the annual state pension uprating exercise, around 11 million pensioners will receive a leaflet promoting Pension Credit along with their state pension uprating letter.
Promoting and exhorting to claim are not the same things.
OP should look at recent DWP stats for Pension Credit application processing where she will see that, before the announcement on 29 July 2024, restricting WFP to recipients of Pension Credit, the number of claims not awarded was always high. Between 1,300 and 2,500 claims per week were not awarded compared to 1,900 to 2,500 per week which were awarded.
www.gov.uk/government/statistics/pension-credit-applications-and-awards-november-2024/pension-credit-applications-and-awards-november-2024--2#:~:text=Comparing%20the%2016%2Dweek%20periods,(from%2027%2C100%20to%2053%2C100).
The number quoted by OP covers five years and three months - which averages a non-award rate of 1,200 per week. In that period:
The data shows that since the 2019/20 tax year up to 31st July 2024 the DWP received a total of 848,973 pension credit claims of which 572,565 were awarded. Therefore, around two-thirds (67%) of claims were successful over the period. Do the sums and you will see that is the average non-award rate was around 1,200 per week.
www.financialreporter.co.uk/over-270000-pensioners-denied-pension-credit.html
Since the end of July there has been a significant increase in claims and a significant increase in the number not awarded. That makes sense. It's far more likely that people on very low incomes will have already been claiming PC before the WFP announcement. Claims now are likely to be coming from people who are recently retired or whose incomes are on the margins of award or non award.