Members of Congress spend a significant amount of their time focusing on fundraising, rather than legislating, which has turned politics into more of a fundraising arms race rather than being focused on policymaking. It also makes elections increasingly expensive, giving fundraisers outsized power in politics.
Members of Congress do not, on average, spend an unreasonable amount of time fundraising. Given the amount of time members have out of session, it’s also plausible that most members are able to fit their fundraising activities in around votes and Congressional responsibilities.