alt Hacker NewsIt's quite common knowledge :) if you want journalist material, I think there was a Cash Investigation on the topic a few years ago.
I have discussed this topic with many other engineers (known from engineering school, from working 13+ years in the Paris tech startup ecosystem and from my worker union, whose scope include most tech companies) and I have never heard any of them saying they did not write bullshit CIR reports for bullshit projects. I have myself written my fair share of those bullshit reports. There are even companies whose business is to write the bullshit reports for you in exchange for x% of your CIR credit. I worked with such company.
My experience is different, so far I've defended R&D that I believed to be eligible to tax credits, in order for companies to be competitive with other countries that also subsidize R&D and innovation, namely USA and Canada. You can't generalize a 7 billion tax cut system based on one journalist work (the same and the same is quoted again...), opinions based on a few rotten fruits in the basket, and an anti-startup trend that amplifies this hatred for political and ideological reasons.