A bill must be passed in identical form by both house & senate before it can be signed by the president. So 50-60 bribes could still be used to prevent new legislation, but much more money would be required to promote new legislation. Increasing the house size (growing w population, 1 rep per max 30,000 people as was once the case) would have likely prevented lots of the policy atrocities that have been passed in the last ~100 years. The electoral college is based on the number of congress members, so it would also limit the likelihood of the elected president losing the popular vote.