Yup - this is why it's important we put out a good manifesto and then campaign strongly on important issues for the next few years. We can't regain trust quickly, but we can work to regain it. And in the target seats we fight very hard for MPs that will help us regain that trust.
The IFS have put out a comparison between Labour and LD income tax/benefit policies.
https://election2017.ifs.org.uk/art...its-the-liberal-democrats-and-labour-compared
The short of it is that the IFS is confident that the LD's policy would add up, but they're much less confident about Labour's as there's more ability to dodge income tax amongst the people they want to squeeze. But the LD policy would affect 55% of adults, whereas Labour's would only affect the top 5%.