People in the UK and other countries are heavily taxed at source. And they see it on their monthly wage slip.
And many people don't do a job they love, they do it as they need the money, and are miserable.
The 'look at at that group who are not paying their share and the party in charge is responsible , but we will change it if you vote for us' is one of the easiest plays to get votes and volunteers campaigning for you.