How to deal with friends who only want to talk about salary whenever we meet.

So I have couple of friends from college and I meet them during weekends. Whenever I meet them they wanted to talk about how much they have given taxes, what their salaries is or how they worked this week. I know that work gets too much and sometimes you need to vent somewhere, but everytime we meet this is becoming too much. Sometimes I feel a bit out of place as they comparatively earn a lot than me. I meet them to clear things out of my head and prepare for next week,but this constant comparison is getting too much for me. I have asked them to talk about some other topic but sometimes after we come back to discuss the same things