Any railway station with a large, multi-storey car park (particularly one for 'season ticket holders') is indicative of a planning failure. The money spent on building them should instead be spent on kerb-separated cycle tracks on main roads, local all-day bus services with bus priority corridors, and new and re-opened tram networks. In that order.
If nothing else there should a franchise requirement to provide cycle parking as laid out in the ATOC's guidance on cycle parking provision. This would require the to be good spacing between the hoops as well as ensuring that there's generally 80% occupancy of cycle parking, if there's regularly more cycles than this then more cycle parking should be provided, even if this means losing car parking spaces to provide it.
As I suggested this should be a franchise commitment with it being acted upon until 18 months before the end of a franchise or 6 months to the end of an extension.
There could be exceptions to this, but generally only at stations which have no car parking or only minimal disabled parking. Even then there should be discussions with the local highway authority to provide cycle parking near to the station.
This would probably result in, even when losing car parking spaces, rail travel being more attractive. As if you own a car then you are likely to drive for journeys other than your commute, as you have invested a lot of money to have the car. However if you don't have a car you are more likely to use trains for more of your travel.
If parking a car became harder and parking a bike was a lot easier then more people would cycle. You would then start to see the critical mass of cyclists that would mean that investment in more cycle facilities to get to the stations and around town becomes politically attractive.
Otherwise you end up with cycle routes that are poorly used because there's few cycle parking facilities, it those that are provided are of poor quality.