Herbert Crossman, from Harrow, north-west London, hung from a crane for two hours in Trafalgar Square, attached by the ankles with a bungee rope.
The 60-year-old allowed change to fall from his pockets into three tubs beneath him to show how the British people are "haemorrhaging money".
One tub was for the government, one for utility bills and one for his income.
"Everything is going up - gas, electricity, the congestion charge, parking, petrol - everything," said Mr Crossman, who had permission to stage his protest.
"It's our money the government is spending and wasting, not their fat-cat salaries.
"If I was doing what they are in my business I'd be out of work by now."
He did not prepare for his suspension but had a medical check to make sure he had good blood pressure and circulation.