The 'scroungers' however are draining real resources for nothing apparently in return. Not that they can provide anything because there aren't sufficient jobs for them.
In other words they are not 'scroungers', they are just the 1 in 20 people who can't get a job under neo-liberalism because it requires about 5% permanently unemployed to control inflation.
What we do get annoyed about are the 'idle rich'. Those who appear to get their money 'for nothing' the same as the 'scroungers' and then flaunt it by buying expensive stuff.
There is no reduction in public service capability by the rich having vast sums of money 'offshore'. The government is never short of money - as they demonstrate everytime somebody they don't like needs bombing, or a set of new nuclear submarines need purchasing.