Ad 5: more data doesn't help if the main problem of your research is that your data is shit. People benefit from generating tons of shity data because they get

Ad 5: more data doesn't help if the main problem of your research is that your data is shit. People benefit from generating tons of shity data because they get more money, which looks good on their resume. If their results are shit, they simply write "more data is needed" and they benefit even more from the call for more data.