Flexibility in spending and eliminate my worries ....

Yesterday, I made up the sentence below and asked my non-native English speaking friends to check the grammar.

(1) I like using credit cards because they give me flexibility in spending and eliminate my worries for cash.

Some said that the green words were not grammatically perfect. Others thought that the sentence was clear. I really don't see any problems with it. Please give me your feedback. Thanks a lot.