The part government-owned NHS performance watchdog Dr Foster said last month that hospitals were "full to bursting" as bed occupancy figures topped 85 percent.
Patient care and the smooth running of a hospital's service begin to be affected at this level, according to the report.
Last month, 95% of beds were occupied on average across the country.
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Owners must also prove they have something to pick up dog mess with under new rules imposed by one council.
The former prime minister made the comments as he prepares to return to politics saying he wants to be "part of the debate" on Brexit.
The new measures would mirror childcare vouchers and see workers sacrifice some of their salary to benefit.