The commonest words used in conjunction with 'banker(s)' over the last two years are greedy, disgraced and shame, according to Collins Dictionaries, and cited in this BBC article. Surprisingly, the word 'responsible' also often appears in close proximity to 'banker', but usually only because the sentence is something like 'bankers are responsible for the mess'.
The terms 'the 1%' and 'the 99%' have been much in evidence recently, mostly due to the Occupy movement, but they are not new terms.
Bankers are often referred to as 'fat cats', a term that dates back to the 1920s. The term was once used almost exclusively about bosses in the private sector, but over recent years council leaders and other public-service workers have been accused of being fat cats, too. Collins discovered that 'fat' is now the commonest adjective used with 'cat', ahead of pet, stray, pussy and scaredy, the next four in the list.
The BBC piece that this information comes from also considered how difficult it is to give exact definitions of financial terminology. When some people think of 'rich' people, they are referring to earnings, others consider their total wealth, while yet others regard anyone running their own business, regardless of size and profitability as rich. Chelsea FC owner Roman Abramovich and one of the richest men in the world apparently said in court, when asked, that it was hard for him to say whether someone was wealthy or not. Robert Frank, author of Richistan, found when he interviewed people that most people's definition of 'rich' was subjective and was often considered to be twice their own current earnings.
Here's the BBC piece.