"Of course, departing from the facts of the two cases, it might be argued abstractly that (1) a poor woman finds it more difficult than a rich woman to leave Texas or Georgia in order to get an abortion in a jurisdiction where that might be legal, and (2) she cannot afford treatment by a private physician who, some might say, would be more inclined to find a legal reason for the abortion. Hence, the two statutes bear unequally upon the poor. However, the same theoretical argument could be made of many types of conduct proscribed by the criminal laws of Texas and Georgia. There are jurisdictions to which wealthy persons may travel in order to indulge in the doubtful pleasures of gambling at will, using narcotics without restraint, and enjoying a plurality of wives. Could these doubtful “advantages” on the part of the rich be relied on as any basis to set aside the criminal statutes of Texas or Georgia proscribing such activities within those jurisdictions?"