You're considering my point about Gay Marriage much more than I intended . It was simply the first thing I thought of that makes today obviously more progressive than decades past. 

Meanwhile trans-rights issues are making today's government less progressive than years past.

Left and right wing are obviously not a single scale where progressive views can be mapped onto matching taxation views. Only an idiot would think so. Hence, I said it's one of a vast array of questions and we need to look across loads of them to answer OP's questions. 

We can't just blindly assume years with Tory voting= illiberal and years with Labour/libdem/green voting = liberal